Because its all the media tell them to concentrate on as the biggest threat to their existence (other than if your skin is the wrong colour). The major UK newspapers published on average 9 articles every single day on the topic of trans people. Thats 17,000 articles in 5 years. And people seem to lack the critical thinking to see this and see it for what it is.

Probably having gay thoughts and desperately trying to find some external reason for it.