Why did Adolf Hitler hate Judaism?
The question here really misses what Adolf Hitler hated. He had
little to any interest or knowledge about what the Judaism was. He
did not have pointed critiques about Jewish ritual or Jewish belief
that he believed to be wrong or evil. He hated the Jews as people.
It was his belief that Jews themselves were inferior beings; he
couldn't care less about their religious beliefs. This is why Adolf
Hitler sent Christians who did not even know that they had Jewish
ancestry, but had a Jewish grandparent, to the gas chambers. It was
a "racial" issue, not a religious one.
If you wish to know why Hitler hated the Jews, please see this Related Question.