Nobody is asking you to believe or not believe anything. Government can’t police your thoughts. You could be the biggest anti-Semite in the world, but if you never harm a Jewish person, so what?
Just stay out of the way as gay and trans people claim their equal share of rights to marry, adopt, affirm their identity in public and live free of hate crimes that disproportionately maim and kill them.
It helps if you can see gay and trans people as actual people, but you can believe they’re green space aliens if you want, as long as you reach the same result.
Deal?