His Father is a Northern Irish Protestant and his Mother is an English Jewess. So by Judaism's own way of measuring the Jewish Faith/Race through the Mother, this makes him Jewish.
He considers himself an Atheist Jew. He has said: "I'm an
atheist, but I'm very proud of being Jewish. It means I have a good
work ethic, and you get Jewish humour and you're allowed to tell
Jewish jokes. For instance: did you hear how copper wire was
invented? Two Jews fighting over a penny. And so on."
His father is Protestant and his mother is Jewish. Daniel has said that he is very proud of being Jewish.