Hitler had already been 'outed' in 1931, through his relationship with his niece, Geli Raubal. She committed suicide, but the resulting scandal certainly did not help Hitler in the 1932 German presidential election, which he lost. As flaglady has correctly noted, no serious historian has ever presented a scrap of evidence that Hitler was a homosexual. He was a lot of evil things -- but not, evidently, that.
Have you read the book cited in the article?