I don't think this forum, or any other on the internet, are unique in the fact that there are some rude people about who like nothing better than to provoke others for the sake of it, and probably because they have nothing better to do with their time.
When I was a little girl I remember my grandmother telling me about a neighbour who lived in her street that "nobody bothers with her because she just causes trouble". This is not a new thing and is not limited to internet forums, although the anonymity afforded to people on such forums does make it easier these days I suppose.
Having been at the end of various kinds of verbal abuse for expressing my views in a few places because I am a newbie, have not posted in the right place, have said the wrong thing in the wrong way, or any number of other random reasons by people who have been there longer, think they own the place, know everything better, are taller, more beautiful, or just plain pig-headed, I have come to the conclusion that it is not worth my while to get involved with people like that and I now ignore them.
"Never argue with a fool, onlookers may not be able to tell the difference" (Mark Twain)