He needs to no longer exist, and all who follow him need to die.

Jesus Helguera Uncle Bob was cheered by the news. He wasn’t certain what good he’d be on this expedition other than to try and keep a protective eye on Alice, who now seemed more capable than he of handling the adventure.
He watched Dick take in the information. He was pleased to have the man running the show. But now he began to have second thoughts. What were they doing if they weren’t going after Rebecca? Was it really their business to go halfway into Mexico to destroy a Mexican bandit’s camp and operations? It suddenly became a bit preposterous to him.
He decided to speak up; after all, this wasn’t really their fight. It wasn’t even the fight of the Arizona Territory or their Rangers, and what if Alice got hurt in all this?
He leaned forward. “Folks, I don’t like to quibble over details, but is it really appropriate for us to be involved in all this?” They all looked at him as if he’d been speaking in tongues.
Dick replied, grinning a little sheepishly. “Uncle Bob, you’re right, always the voice of reason.” He glanced at Del Toro. “I was getting a bit caught up in the moment. I…”
Alice cut him off. “It is what Chica… Maria asked you to do.” She looked at the men as if they’d suddenly lost their minds. “Of course it’s what must be done, and it shall be done.”
“But Alice,” Del Toro covered her hand with his own, “These men are correct. This is Mexico’s battle, and you all are a long way from home. Perhaps it is best to leave it to Kosterlitzky. He has a good force and he is a good man. He will bring them to justice.”
“But that’s not the point.” She sat up a bit straighter in her chair and covered part of Del Toro’s great hand with her own. “Until three days ago, I had no idea that people like Gold Hat existed. I didn’t know that humans were still traded like livestock. I didn’t know the heartache and pain suffered by so many at the hands of this brute and now you tell me he’s out of retirement. That he could do more of these things to others. I don’t care about him being brought to justice, or punished for what he’s done. I want… I want...” She looked at Uncle Bob and smiled. “Robert, you know how remarkable what I am about to say is, but this man, he needs to be snuffed out. He needs to no longer exist, and all who follow him need to die.”
Uncle Bob grinned. “Then there is nothing more to discuss.” He looked at Dick Welles. “Are you in?”
Dick Welles smiled broadly and took a sip of his wine. “Uncle Bob, I was never really out.” The Mule Tamer II, Chica's Ride