Question

Why was Adolf Hitler such a mean person to the Jews

Answer 1

It sounds impersonal to say it but it was really a "red herring" so to speak - he wanted his party to demonstrate how they were "fixing Germany's problems" by blaming an entire ethnic group as the culprit. What's unbelievable was the follow through of not only NAZI party officials, but the entire populace to "eliminate" the problem.
If you watched the reaction to 9/11, it is similar in the fact that it unified disparate groups to a common purpose - right wrong or otherwise.

Answer 2

Hitler was a mean person to the Jewish people because it has been said that his mother died of cancer and the doctor that she had was a Jewish man, he had a Jewish girlfriend in school who finished him, so for the people that think Hitler was nice think again he put all them good people who had done nothing wrong into concentration camps and basically starved them to death