Ukraine was heavily in favor of the nazis when they invaded, so this wouldn’t surprise me. They got their shilling kicked back to them however, as the nazis viewed them as inferior slavs.
As for the rest of the USSR, it wasn’t really bad. There was a jewish Minister of Foreign Affairs (Maxim Litvinov) that Stalin changed in order to ease relations with Germany, but he was kept around and became the Soviet ambassador in the US after they entered the war. Anti-Semitism certainly wasn’t an important part of soviet propaganda or government statements, much unlike other anti-semitic states like Germany and Poland.