He’s a Muslim.
Because, contrary to what his name implies, he was born to Pakistani parents and then changed his name to an Anglo sounding one as he liased with the Pakistani Consulate in Chicago, scouted out targets for the 2008 Bombay attacks and generally facilitated jihadi goals under the guise of a DEA informant.
So, his hatred was not due to bad Vindaloo and Pakoras, but inculcated from infancy, his uncle is a serving PakArmy Colonel and he spent much time there.