Up until a few hundred years ago, religion used to be our way of understanding all the shit we didn't have answers for -- which was a lot: stars, rainbows, the causal relationship between fucking and dropping babies* -- and a way to feel like we had emergency options when we were completely helpless: times of plague, famine, warfare, & of course, death itself. There were gods we could try to please or mollify by killing things, and then harass for military, climatic and antiviral favors. It usually didn't amount to much, but one lucky break in 50 is enough to keep faith alive for the desperate. The gods were like us, capricious and selfish.
Then it was God, singular, for very specific and random reasons; archaeologists and anthropologists are still finding fun new evidence to confuse themselves with. It appears the Israelites were originally a low-ranking (perhaps even persecuted) caste among the Canaanites, another semitic people who would later become their hated arch-rivals in Biblical lore. The Hebrews apparently said 'fuck this' at some point, seceding from Canaan & absconding with a member (or two) from the local pantheon, probably a god who was traditionally seen to look after their caste -- and his wife -- before settling in Israel. After a time, god got a divorce, & became the piece-of-shit God we know & hate. Everyone forgot about the ex-wife, because no one wants to picture their Holy Father having sex.
In the monotheistic beginning, God wasn't any better than the gods that came as a matching set. He had his own crew, and still acted like a mercurial, blood-thirsty dick. The idea that the Jews are a 'chosen race', one that will inherit a blood-soaked Earth after their messiah comes to murder the 'gentile' >95% of the population, is one I'd probably complain about, if it wasn't bullshit... Especially since the Jews feel no compunction to save any of us, like the Christians do. Granted, it makes them less annoying to be around, but as a philosophy, Orthodox Judaism is terrifyingly genocidal; the Hebrew vision of a perfect world involves all of us being murdered by Seraphim with flaming swords.
It really wasn't until 2000 years ago that Christianity made excuses for his temper tantrums, and repainted Yahweh as a kind and loving god, despite a shitload of evidence to the contrary. The cruel games he played with Abraham & Job, the fact that he cursed the entire human race to disease, natural disasters, and death in general, all because he got his feelings hurt when two morons ate the wrong fruit... what the fuck? If god existed, why would anyone think this twat deserved 'faith'? Seen objectively, the god of the Old Testament is the best argument against 'faith' around. Any ideology that makes a virtue of willful ignorance, even in the face of overwhelming evidence to the contrary, needs to be killed with napalm.
'Yahweh' or 'Jehovah' - extrapolated from the four consonant tetragrammaton (YHWH/JHVH) - was still the blood-and-thunder bad-ass that the Hebrews needed him to be, but he was slowly picking up the loving, motherly characteristics of the wife he left behind once they settled down, moving closer to the Christian concept of god. He wasn't capricious or cruel. He was fair and loving... although he did get drunk with Satan once and pick on Job; he just kind of laughed as the devil killed Job's family, gave him weeping, smelly skin ulcers, and treated him like a bitch... all on a bar-stool bet. He felt bad about it the morning after, though... and made it up to Job with a shiny new family. And an awesome goat.
This new-and-improved, loving and caring, monotheistic 'Yahweh' supposedly wasn't governed by human faults and weaknesses, even if he let it slip to Moses we were created in his image. It may seem ridiculous from a modern POV, but it all seemed plausible to them. And Christians, Jews and Muslims are still in denial about this murderous piece of shit.
Insecurity is definitely a part of the divine character, since he constantly needs reassurances that we love him, even after the douchebag kills our cats and grandmothers. It's always our fault; 'it's not you, God, it's me'. Those tens of thousands of babies that die every day obviously have it coming for their sins. If god's so dead-set against abortion, maybe he should prove it by not killing the children of parents who wanted to start a family. So contrary to whatever his biographers and publicity agents have been telling us for several millennia, god's just as flaky and mercurial as, well... Mercury.
Looking back at all the sadistic Old Testament tantrums - Sodom and Gomorrah, the Flood, cursing several billion people to pain and death because their great-great-great-great-etc. grandparents ate some fucking fruit - you'd have to conclude that if God did exist, he'd be a psychotic douchebag and all-around piece of shit. Every bit of suffering in the universe was his doing, yet we're still supposed to thank him for shoving this shit sandwich down our collective throat, to grovel and smile and beg for vague nothings via prayer. Yeah... fuck that. If you're... how should I phrase this... stupid enough to bother with a prayer, and -- shockingly -- it doesn't work out... the problem's on your end. Unplug it, plug it back in, and pray harder, ferfucksake.
He apparently needs 7 billion people to pray at him daily, so he can look at himself in the quantum mirror and smile/frown/grow tentacles, but he can't be bothered to answer a single one. Are you certain you've done everything right? Yeah? There you go, you're too proud of your righteousness. That's not it? Well... file it under 'moves in mysterious ways'. For the desperate and the stupid, faith is invulnerable to reason. What would you think of a person who bought an ant farm, then tossed it into the furnace a day later because the ants wouldn't tap-dance when he asked politely? God's nuttiness is several orders of magnitude more severe. Thank God for not existing.
Now that all those answers religion provided are no longer needed -- and wrong about absolutely everything -- it's only purpose is to whisper bullshit in the ear of the 'troubled soul', and provide reasons for humanity to kill itself over long outdated lies. We might as well murder each other over slight historical disagreements about Santa Claus. Elves or gnomes? Reindeer or caribou? Scarlet red or cherry red? Guh.
I'll make this point clear, however: as someone raised as a JW, my dislike for the Abrahamic faiths is profound, but never extends to the worshippers themselves. People have the right to believe in any bad idea they like, as long as they're not harming others. That includes ISIS supporters, Communists & neo-Nazis. The second we start policing belief, we've let them turn us into the bad guy. Freedom of belief, of speech, of expression, only truly exists when it protects the rights of the worst of us. When we start making Constitutional exceptions for those the majority find objectionable today, we open the door on persecuting the unpopular minority of tomorrow.
*(They'd narrowed it down to wind and water as the most likely culprits for pregnancy, before agriculture became a thing and matriarchies became patriarchies; like flint knives and mastering fire, it's hard to know if an understanding of sex led to agriculture, or vice versa.)