A Bronx political activist is being ripped by fellow Democrats for spewing antisemitic remarks on social media after he crossed party lines in a heated New York City Council race to endorse a GOP candidate. The hateful remarks made by Efrain Gonzalez in old Facebook videos are being dredged up by Democrats after he switched party lines and endorse Republican Kristy Marmorato instead of incumbent Democrat Marjorie Velazquez in the Bronx’s 13th District. “Jews are the most corrupt real estate people in New York,” Gonzalez said in one video, which had posted earlier this year on the social media site....