Yeah, but... the difference between Matt and people in the police/army is that Matt is actively breaking the law. And he's doing it in a way that will ABSOLUTELY take Foggy down with him. (If Foggy doesn't get put behind bars as an accomplice then he's at least going to get disbarred.) That's not even going into what could happen to him if Matt's enemies figure out Matt's identity and decide to go after Foggy in revenge.

So it's not even as cut and dry as 'Matt is putting the needs of others over his friends.' What's really going on is, 'Matt is putting his friends IN DANGER so he can help others.' And that's a whole 'nother ballgame. Foggy has every right in world to be pissed at what Matt's doing.