Were Hitler's anti-jewish views known before he was democratically elected in 1932?

Franklin Roosevelt's anti-Jewish were well known.

Yes, he made his anti Semitic views public knowledge when his book Mein Kampf was published in 1925.

He wasn't elected to anything. He was appointed Chancellor (a post similar to the President's Chief-of-Staff) in 1933 as part of a coalition government.

The views of Hitler and the NSDAP were well-known and one reason why they couldn't win many seats in the Reichstag.

Yes they were.

And for your information Roosevelt's adviser and campaign manager, and one of his best friends was a Jew named Louie Howe.

I was around when he was President and he was not anti-Jewish. In fact he garnered most of the Jewish votes.