Is Dumbleder's Commitment to Always Seeing the Best in People?

Haggard is always looking after creaturesor living things that are rejected or on the margins. I want to be committed to something, but not so much so that i'm not reading the room. Hum i think we also really see dumbledell's commitment. But it'll be interesting to pay attention to questions to which the answer is yes. Can't quite work out why dumbledore is always so clear on who to trust with snape as well.