Sure we have. You're just in denial.
For starters, millions have died due to that disease which was once called GAY RELATED IMMUNE DEFICIENCY or GRID), because only Gays got it.
But homosexual activists screamed about 'stigma' and it was changed. Plus, it became clear that homosexuals were also infecting the Normal community through the vectors of them donating blood, sharing infected needles and not telling hetero females that you were also taking it up the poop chute too.
And then there are the thousands of little boys raped by homosexual pederasts. The rate of child sexual assault for homosexuals is far above that of hetero perverts (the ones assaulting underage little girls).
Homosexuals make up 2 percent of the population, yet commit between 25 to 40 percent of all the kiddie-raping. Researchers think that the rate must be even higher, since it is a very under-reported crime.
Look for how long molesting had been taking place in the Church, Boy Scout and Sandusky scandals before they came to light.
There are MILLIONS of reasons why homosexuality is wrong. It is deviant, diseased, deadly and especially dangerous to children.
... you just don't want to admit it.