The fallacy of an appeal to an assumed authority (in this case, 21st century liberal values). I'm not so critical of homosexuals as I am of the homosexualist movement, a political movement which wants to instill the idea that homosexuality should not just be tolerated but in fact celebrated, from a very tender age via public education. The homosexualist movement is part and parcel of the 1960s sexual revolution. Basically, my problem is with the values espoused by the sexual revolution as I subscribe to traditional, religious morality and ethics.
I oppose violence to gays, lesbians, transgenders, etc. But equally, I oppose attempts by the state to criminalize speech as "hate speech" which is antagonistic toward homosexualism. These days there are situations in which the state has revoked the tax exempt status of religious organizations, banned entry and issuing of visas to religious preachers, and other punitive measures against the religious element simply for expressing our antagonism toward homosexualism.
If you study history, you will realize the so-called LGBTQ identity did not exist before the 20th century. It was never an identity or a community. This is a very new development that sexual behavior becomes the basis of identity, and is the basis of forming communities. It is a 20th century innovation. I believe it is a social engineering project for the purpose of undermining and sabotaging the movements of bonafide minority communities based in race and/or religion for civil rights.