It's interesting, this was something I noticed in the gay community prior to coming out as trans. It seemed like the closer we got to acceptance in mainstream society, there were increases in drama and BS within the community - most often directed at people that others felt were giving the community a bad name/poor image. People want so badly to fit in, conform, and be seen as normal that they judge, alienate, and cast out anyone that doesn't fit the mold they've come up with for what we should be.
There is a quote from my favorite book that sums up what I think about it: "When we don't know who to hate, we hate ourselves." I am sorry you are having this experience, and I hope it doesn't dissuade you from continuing to participate and contribute in the community.