The first two are fairly bigoted, the second one same stream of thoughts that led the U.S. To many of its Eugenics programs. Three who cares. Homosexuality is found in 250 species, and in humans it's natural, the reaction to it however is completely man made. There's been numerous "scientific" explanations for transgender, but honestly they're all too close to eugenic thinking. What trans folks do in no way impacts you. And treating them differently just like with the rest of the LGBT+ is discrimination.