I think the most annoying if not demeaning is the abundance of ignorance about human sexuality.
The worst being that people chose to be gay, or straight for that matter.
Every legitimate scientific group agrees that we are born hard wired to our sexuality. LGBTs don't chose to be such any more than I choose to be straight. I felt sexual urges long before I ever thought about sex but the one thing was certain of was that it somehow involved women. If you ask the mothers of LGBTs when they first realized their children's orientation was different most will tell you it was around the ages of 4-5. That is long before the child had given any thought to sex or who attracts them.
Today there is a strong theory that it has to do with the PH levels in the embryonic fluid, but that can't be changed. There is also the belief that in early development the fetus gets several bursts of hormones. For a male these would tell the embryo to develop testis a penis and a male orientation toward females. I'm not up on this enough to say that is true or false and I may be stating this wrong.
This same uneducated view leads to the belief that someone can change their orientation at will, if they are just willing to deny their attraction to the same sex. But nobody has ever succeeded in doing anything more than creating self loathing and misery among those unfortunate enough to believe such drivel.
Homosexuality exists in virtually every species on earth so the idea that it isn't a natural thing pretty much goes out the window. Also it is very common for children from the same homes, raised by the same parents, in exactly the same way, to include both gay and straight children. So it obviously isn't nurture that determines one's sexuality.
Sadly little can be done about ignorance but the bright side is that more and more mankind is evolving to accept that people are different.
However don't get too excited in Russia a law was just passed making homosexuality, in any form, illegal. Under Islamic law it will get you a death sentence, yet there are LGBTs in all of those places.
For those who want to cling to old outdated theories, I hope you like the extremes of hot and cold.