According “The Pink Swastika”, the Night of the Long Knives was not about purging fags at all, but getting rid of Roehm due to fear he was going to compete with Hitler in a power struggle of some sort. Plenty of fags were left in the Nazi party. In fact, the Nazi philosophy was in its inception wedded to certain elements of homosexuality. Hitler was most likely one himself, according to “The Hidden Hitler”, a book by a German historian whose name I can’t remember at the moment. Lothar something or other, who is not “anti-gay” btw.
In fact the “book burning” was in actually to burn the records of the Human Sexuality Institute, or whatever it was called, that had a lot of records of Nazi sexual perversion.
I didn’t mean to imply that Hitler purged the SA because of the fruits, rather he purged them — as you pointed out — due to a power struggle; but the SA leadership was notoriously fruit.