Your intent isn't really relevant to it. I know that's a very blunt way of saying it, but right now one of the big complaints on this board seems to be "WI Hitler X" and the previous gay Hitler thread got locked. Doing something that you know will produce a certain response isn't okay if you add the disclaimer that you didn't intend the response that you know will happen.
As for whether it would impact the queer community, it would only be brought up and used as an accusation by the type of people who would nothing wrong with denying LGBT rights anyways, regardless of any Hitler-related actions. Heck, people accuse Hitler of being an atheist despite the fact that killed atheists (and other opponents of the quasi-Christian state religion) and say that Hitler believed in evolution even though he banned Origin of the Species. Vegetarians and non-smokers also seem to do fine despite Hitler's pro-stance on those issues. The type of people who try to demonize their opponents with Hitler comparisons are not looking for evidence but rationalization. They would be against LGBT rights no matter what Hitler did.
Finally, don't be stupid yourself. Hitler would never have gotten into power if he was a seaplane. Without hands, he would have never been able to write Mein Kampf after the Beer Hall Putsch and his political influence would only have extended to the immediate party members. Rudolph Hess might have helped Hitler write Mein Kampf, but Rudolph Hess has been historically noted as a very bad secretary and probably would have added numerous errors to the book. Plus, Hitler would never have been able to fit through the doorways of the Parliament Building, which would have made him ineligible to being elected.
LOLs, I'm sorry but nuremburg rally with a seaplane is hilarious