There's a difference between censorship -- a higher authority modifying a work to remove undesirable content -- and editing -- the creator deciding to leave out or change content that makes a work worse.

Bigoted speech that doesn't serve to examine the bigotry makes just about any work worse, as well as the world as a whole. I'd defend to the death the creators' right to put that in a movie trailer while criticizing their ignorance at actually doing it.

I think the desired response was that the movie makers understand the offensive meaning of what they put in the movie. I don't think Vaughn or the movie company got it--apologizing for upsetting people is different than apologizing for what was actually done--but it was worth complaining about.