We know that Hitler was a strange guy. But there is absolutely no proof or sign that the could have been homosexual. Except of Roehm there were no other high-ranking nazis homosexuals. As I already said: If a so called "Roehmling" (a homosexual nazi) was found he had for sure nothing to laugh anymore.
You may not know this, but there's an agit-prop book floating around that basically sets forth an argument that the Nazis were closet homosexuals and that the Nazi persecution of homosexuals did not take place, regardless of the extensive official documentation. The quality of the 'scholarship' is about the same as what you could expect of any denier of the Jewish Holocaust but a number choose to take it as fact anyhow.
So, the way to look at it is, if there are quite a number who would deny the Jewish Holocaust despite the indisputable crush of evidence that confirms it, then it's hardly surprising that there are also those who would deny the Nazi persecution of gays that was on a far lesser scale (although still well-documented). It's usually an exercise in futility to argue with someone like that, in either case.
"Hidden Hitler" is an extremely well-researched book by a noted German historian. And people can scoff at "The Pink Swastika" because it is not published by a maintstream publisher but it is similarly very well researched. You should read both books if you want to learn about homosexuality and Nazis.