One thing that I’ve found helpful is from Naomi Klein in her most recent book. To paraphrase - conspiracy theories often get the feelings right, but the facts wrong. For example, we are all being screwed over by banks and hedge funds, but it’s because of the structures of capitalism, not the Jews. But it’s much easier, mentally, to pin the blame on one specific person or group than to grapple with the flaws inherent in the social systems we’ve created.