 The theory that Soros was somehow causing Central American migration at the southern US border apparently dates back to late March 2018, however.The October 2018 strain of the theory has been described to combine anti-semitism, anti-immigrant sentiment and "the specter of powerful foreign agents controlling major world events in pursuit of a hidden agenda", connecting Soros and other wealthy individuals of Jewish faith or background to the October caravan.Both Cesar Sayoc, the perpetrator of the October 2018 attempted bombings of prominent Democrats, and Robert Bowers, the perpetrator of the Pittsburgh synagogue shooting, referred to this conspiracy theory on social media before their crimes.