In many of his speeches he specifically talks about Jews being a plague or being the cause of wars an social problems. here is a speech he gave. here is another one. We don't even need to go so far as to read documents or interpret who decided what in his party. We have his hatred evidenced by his own words to the public.

Editing to add. I found a site that holds some of his speeches. I'll post a few excerpts where he directly talks about the Jews. This is just one speech that I"m looking up. I don't really care to go through all of his speeches as I tend to find them stomach churning here is the site

December 11, 1941:

Roosevelt's New Deal legislation was all wrong: it was actually the biggest failure ever experienced by one man. There can be no doubt that a continuation of this economic policy would have done this President in peace time, in spite of all his dialectical skill. In a European State he would surely have come eventually before a State Court on a charge of deliberate waste of the national wealth; and he would have scarcely escaped at the hands of a Civil Court, on a charge of criminal business methods.

This fact was realized and fully appreciated also by many Americans including some of high standing. A threatening opposition was gathering over the head of this man. He guessed that the only salvation for him lay in diverting public attention from home to foreign policy. It is interesting to study in this connection the reports of the Polish Envoy in Washington, Potocki. He repeatedly points out that Roosevelt was fully aware of the danger threatening the card castle of his economic system with collapse, and that he was therefore urgently in need of a diversion in foreign policy. He was strengthened in this resolve by the Jews around him. Their Old Testament thirst for revenge thought to see in the U.S.A. an instrument for preparing a second "Purim" for the European nations which were becoming increasingly anti-Semetic. The full diabolical meanness of Jewry rallied round this man, and he stretched out his hands.

...

We have seen what the Jews have done in Soviet Russia. We have made the acquaintance of the Jewish Paradise on earth. Millions of German soldiers have been able to see this country where the international Jews have destroyed people and property. The President of the U.S.A. ought finally to understand-I say this only because of his limited intellect-that we know that the aim of this struggle is to destroy one State after another. But the present German Reich has nothing more in common with the old Germany. And we, for our part, will now do what this provocateur has been trying to do so much for years. Not only because we are the ally of Japan, but also because Germany and Italy have enough insight and strength to comprehend that, in these historic times, the existence or non-existence of the nations, is being decided perhaps for ever. We clearly see the intention of the rest of the world towards us. They reduced Democratic Germany to hunger. They would exterminate our social things of today. When Churchill and Roosevelt state that they want to build up a new social order, later on, it is like a hairdresser with a bald head recommending an unfortunate hair-restorer. These men, who live in the most socially backward states, have misery and distress enough in their own countries to occupy themselves with the distribution of foodstuffs.