Unfortunately I think a large part of this is a byproduct of the times we're living in. People will say "The Christians I know personally are pretty good people, but Christians, Christians are so judgey" Similarly we'll say "The Republicans I know are pretty good people, but Republicans are really xxxxxx" or similarly "The Democrats I know are good people, but Democrats are so xxxxxxx."
So many of our opinions are not formed from first person experience or deep examination of facts. Or, we take one experience and apply it to a group as a whole.
Another problem is that the judgey Christians and churches make a lot more noise - and get outsized attention in today's attention-seeking environment.
