The real question here is not "Why did Hitler hate Jews", rather "Why did Hitler hate?" People hate other races, religions, politicians, wealth, poverty, other nations, neighbours, and ex-wives. The hate is the same so the question is not about Jews but about hate. I don't care why one man hated one religion, I do care about why billions of people walk around hating, and often hating enough to kill. There's over 12,000 murders per year in the USA alone. I don't have a single answer about why people hate, in fact it is hard for me to understand because I don't hate anyone or anything. I distrust and in those cases I can tell you why, but it doesn't become hate. Cheers!
Russian jets pound Islamic State in Palmyra (DPA)
from the article: Why did Adolf Hitler hate the Jews?