I'm no psychologist, but from my experience I can understand what you're saying and I think this kind of behaviour stems from the individuals own personal life drama and their issues of self-acceptance. 

You positioned this article to group these behaviours as something that happens with all the LGBT people that you encounter. And it also sounds like you feel this behaviour is directed towards straight people. 

I see a lot of self-hatred in the gay community that is expressed outwards towards other people. I have struggled with being gay and I'm still not completely comfortable with it. I have a lot to work on with self-love and self-acceptance and see a lot of other people struggling with the same issues in my community. I've also seen some of my 'friends' hate on other people, but it's not just straight people... typically it's everyone. 

Some of these people that I'm talking about look like they've got their lives together and are living a fabulous life but really deep down inside they are hurting so much. So please, next time you feel like they are hating you or the straight community... take a moment to understand that the issue is a lot more complex and probably has a lot more to do with themselves than with anyone else. 

This does not make the behaviour right, or acceptable. And I can't be speaking on behalf of the whole community, but I do understand what you are saying and I'd love to see my community find a lot of healing and be able to fully love and accept others, just as they seek to be loved and accepted.