I think the hostility was due to the fact that the poster in question has only posted three posts, the majority of which have to do with their love/admiration of Gaga or whatever, and their own personal like of Gaga more than Michael on the post everyone here seems to have a problem with. The one post this person has made about Michael goes as follows:
Looking at the context of the post in question and the poster in question's history--there's much reason for suspicion/outrage. One at least questions what the above poster is doing on a Michael Jackson fan forum spewing love for Gaga and saying Michael will never be well liked/loved/respected because of the allegations. It seems to me as though they'd be more at home at: http://www.ladygaga.com/forum/
...so no, it's not crazy at all, at least in my humblest of opinions, and everyone's reactions appear to be appropriate. Had the Gaga love been voiced by someone with more posts (as of now he/she only has 3 posts) and time spent on the forum, I doubt people would have reacted the way they did in this instance.
I hear you! Fair enough I guess.
I just don't like hostility in general and I've seen too much on MJ forums where someone dares like another artist as much/more than Michael and are vilified for it.