Their "christ", our Jesus. He was Jewish and preached to his people, the Jews, only. He didn't invent any new religion. Even if I, as a Jew, would accept him as the Messiah (Jewish word and belief) I would still be a Jew, like himself.
Riot police line up as fresh migrant protests erupt at Budapest railway station (Reuters)
from the article: Deputy FM: Anti-Israel bishops have hijacked the Vatican