Although I know there are racist conspiracy theories, it doesn’t mean all conspiracy theories are racist.
You have to get past the racism and flat-earthers to get to the REAL good conspiracy theories. Some of them end of being false, but some seem to be true. Either way they become more interesting.
Any Havanna Syndrome inflicted on Biden would likely be done by Russia and would be unrelated to Jewish people. Russia is the one with the most to gain from Biden losing, especially since the conspiracy theory is Trump is a Russian agent.