Normally when addressing a crowd, one has to observe their tendancies and beliefs. Sure, if Germans were already Satanic as a whole he probably wouldn't not have said that, but as the above says, he had to "talk in their language".
I do this too when promoting Asian Paganism among my familiars, speaking as to how I come from an Asian Christian family, whose nation of origin became disconnected from all the other Asiatic countries around us thanks to enemy Christianity.
Li Hongzhi, leader of the Falun Gong also has a Hitler-esque personality, but sadly due to the fact that most Chinese are brainwashed by Buddhism, he's forced to mix in Buddhist ideology with his books and also makes negative connotations of demon and devil, teachings to sell the idea. He has his own Inner Circle where I take it they practice legitimate Chinese Paganism/Taoism.