Not all arabs are muslims . For example they are a large diaspora of arabs in south america and they are all christians, also many lebanese are christians . They are also many whites european who are muslims in the balkans . Most of the times Arab/jewish mariages are christian/jewish marriages, because it's very taboo for muslims arabs to marry jews
Well you should have said Muslim/Jewish marriages because a big percentage (if not the majority) of Israeli Jews are Arab...Also many 'Arabs' are Christian (if you count non Gulf Arabs as Arab)