I actually see Seth MacFarlane as a (mostly) decent person, with much of the humor in Family Guy being the fault of postmodernism and irony melting American brains. Family Guy makes a lot of trashy jokes, but I think the intent of them is to laugh at American culture rather than whatever stereotypes they're joking about. I even think he's kind of moved past it, since he's essentially just been leveraging Family Guy just to get to make his Star Trek show.
Idk, I've learned to set aside people's more problematic aspects as long as they kick their heels in where it really matters. Standing with the writers every time, even back in 2007 when it caused Family Guy to get entirely dropped by Fox. This isn't even him just doing it because he had nothing to lose. He almost lost Family Guy over this. I will almost always respect people putting their money where their mouth is.