Jacey
everyone can interpret it in their own way. For example, I see that not only did he raise his hand in the way some interpret it, but after a moment he grabbed his own chest, which has nothing to do with Hitler at all.
Following this reasoning, in our history there were many gestures made by Emperors or dictators, does that mean that, for example, a thumbs up or thumbs down is also controversial? In general, it would be appropriate not to move. 🙂
I doubt that he did it on purpose, and even if he did, what would he gain from it? Especially since he denied right after that it had anything to do with hailing.