If someone does something terrible . . .

If someone you know does something terrible to someone else you know — but they do not do it to you — does that change your view of them or relationship with them?

Like, if you are friends with someone, and they do something really awful to someone who did not deserve to be treated that way, how do you react? Do you feel less of a bond of friendship with them or trust them less? Do you figure it was someone else’s situation and has no bearing on yours? Do you try to ignore it but keep it in mind? Do you try to maintain the relationship, but minimize placing trust in that person?