The King of Kings isn't a religion. Jews hatred today for Christ is one of the biggest proofs of His deity and existence. Why would you hate someone that didn't exist? Why would you hate some crazy homeless person claiming that they're the Messiah, unless they are. Do the math. Jews substituted the plus sign in math because it too closely resembles the cross.

Oh by the way, jews also describe Jesus and Mary in the talmud in derogatory terms because well He never existed. Lol.