"You're stupid and not good at what you do if you think people struggling with their problems has fuck all to do with being stubborn. Keeping an injury from you has shit to do with any of that. That's a survivor mentality. That's some PTSD shit. Instead of trying to wash it away, maybe you should start asking questions. This ain't about you. I don't think harboring that kind of mentality is a bad thing right now. You're all trying to survive." He didn't psychoanalyze anybody else out loud, not unless he was outright taunting them. But he found Stiles amusing. And he didn't go for the jugular. He didn't mention Stiles's mom or anything close to his vest. No, Alec viewed this as relationship therapy. He was just counseling Stiles. He was doing a good deed: stiles should be thanking him. That obnoxious little shit.
Alec wasn't surprised when Stiles outright agreed to the favor, completely without question. "Good. So tell me what you want to learn from this spying." It'd be harder since he wasn't speaking to them. He'd have no way of steering their thoughts in the direction he wanted to. This way would be purely as if they bugged the room.