Why are LGBT people more arrogant?

I guess it might have to do with what you say. If you talk in a stereotyped way, say (maybe subconsciously) things that feel discriminating, or generally approach them in a different way, it might change the way they talk to you. It could also be that your particular LGBT community has a tendency to a specific brand of sarcasm, and that it's all done in jest.

The specific ones that you encountered are ignorant, not LGBT people

you hang around with the wrong people.

You just need to find different LGBT people to talk to, bruv. You picked the wrong ones. Keep going. There are lots to choose from.

The troll is feeling oppressed! OMG I'm so sorry, we should never pushback against your bull sh*t.

If it is as you describe, I suspect its everyone not just LGBT people.

I wonder why they are all so angry at me :-(

I have had the opposite experience.  They always seem overly nice to me.  

By saying "The ones I've talked to are always narcissistic and gives snooty remarks" you are indeed generalizing. ALWAYS? Really? Unless every, single LGBT person you've met has been way.

Stop generalizing.

So your generalizing awhile group of people because you talked to a few .

Maybe your not trying to generalizing but you are .

Many LGBT still remain quiet because of attitudes like your yours .