And Magneto is, under more normal circumstances, very good at concealing the fact he has lingering trauma.

He looked up at Blaine, and there was a little something to his look. Gratitude, a little less fear. "Thank you. That does help." He'd had too many people turn on him - not here, but over the last eight decades, that people staying meant more to him than almost anything else. They could be angry. Just don't walk away.