On Saturday, an armed 44-year-old British man, a Muslim, stormed into Congregation Beth Israel synagogue in Colleyville, Texas, and demanded the release of Aafia Siddiqui, a Pakistani serving an 86-year sentence in a nearby federal prison on terrorism-related charges. Considering why a British Muslim might threaten the lives of four Texas Jews in 2022 for the actions of a Pakistani in Afghanistan in 2008 tells you a lot about the poisonous reach of antisemitic conspiracy theories and the need to call out and stop them.