Imagine the outrage if there were some serious research into the medical or mental causes of homosexuality. There is research trying to determine specific DNA genes that cause homosexuality, this would be ok because it would prove the opinion that homosexuals are born that way. To date there is no proof in the way of genes that people are born homosexuals.
RE: U.K. "gay" SJWs admit purposely tainting the blood supply, "because it's the right thing to do."