He's only mentioning Soros because half the mouth breathers among his supporters have been told that Soros is the secret Jew money behind everything that they don't like. They genuinely think he is the richest man in the world and spends tems of billions every year secretly propping up all Democratic candidates, Antifa, BLM, La Raza, the Communist Party, all LGBT organizations, feminists, Muslims, the mainstream media, Colin Kaepernick, hip hop music, the government of Venezuela, you name it.
Just saying his name among those clowns is like mentioning Satan himself.