Look closely.

I do maintain that all sexualities or genders except heterosexuality are either a choice or a disorder.. You may call a disorder a disease.

I base this statement on science, logic and the definition of disorder "something which inhibits or interferes with a normal function or an established system".

Mating, pairing to reproduce, is our normal function and established system. Reproduction is a continuum of life in which living heterosexual cells combine, sharing all the genetic history of both biological parents. No other sexual  or gender relationship can achieve this unique process necessary for life on earth. They inhibit it. Disorder.

I have presented a civilized rational discussion of the facts.

Prove them wrong or accept them. Anything else is uncivilized.