Snape and Dumbledore know Draco’s new standing with the Death Eaters. Dumbledore remembers that he failed to connect with student Tom Riddle and prioritized others over connecting with Snape. Slughorn failed to see the danger in Tom and didn’t find Snape worth cultivating. Snape, Dumbledore, and McGonagall work together to do better for Draco. They have to isolate him: Voldemort finds it too painful to share Harry’s thoughts anymore, but he performs Legilimency regularly on Draco, so they cannot jeopardize Draco by letting him know the Order wants to protect him.
