Isa as we muslims call him, was not arab he was Hebrew a jew, now REAL jews look very arab in fact arabs an jews share the same dna.As far what he means to various religeons, to us (muslims) he was a prophet, not a god or a "son of God" to the jews honestly i dont know bout that one i know they dont see him as the messiah an the jews of his time considered him to be a blasphemer. The christains of course as you know see him as God an God's Son.
Christians believe that if you do not accept Jesus as God's son an the savior of mankind then you can not be "saved" until you do so.by being saved i guess that means ya going to hell in a hand basket, anyway i personally found it hard to believe an ridicuilous for "God" to have a son, that would give God a human fault, which he doesnt have. Anyway thats my input