Christian : yes he is God !
Muslim : has he always been God?
Christians : yes he has always been God since the beginning !
Muslim : so he's also the God of Israel whom Jews worship, the God of the Old Testament?
Christians : yes yes he is also the God of Israel whom Jews worship and of the Old Testament !
Muslim : so was he the one who inspired Moses and his followers to Kill all Mens and boys and women's but keep all the infant Girls to Rape as found in Numbers 31:17-18?
Christian : NO THAT WASN'T JESUS THAT WAS YAHWEH!