The biggest self-caused antisemitism (meaning limiting this comment to discussing the antisemitism triggered by Jewish actions) is when Jews try to integrate into non-Jewish society or are otherwise embarrassed to clearly and openly display their Jewishness or aspects thereof.
The biggest preventer of antisemitism is when Jews stick to Jewish places and society and when interacting with non-Jews make sure they’re wearing a big yarmulka so that there’s no mistake that he’s trying to downplay his Jewishness.