Hmm the Jesus as son thing is complex- some theologians beleive it was a gradual adoption (eg partly at bapttism), other believe He was born as God's son. The Human and the divine co-exist in the same shell.
can upload an entire essay on how Christians, Jewish and Muslims ahre same God if you want? (and that would require a very evil indeed mwahahaha laugh LOL) - but the gist si that they all do as they share the same foundatins, Jesus is NOT a God and neither is Muhamamd- 'Muslims believe the first prophet was Adam, while the last prophet and rasul was Muhammad, thus his title Seal of the Prophets. Isa (Jesus) is the result of a virgin birth in Islam as in Christianity, and is regarded as a nabi because he received a wahi from God. Jesus is also considered to be one of the rasul as God revealed the Injil (Gospel) to him.[1] Contrary to Christianity, in Islam, it is heresy to claim that God had a son.
Muslims believe that God has sent over 124,000 messengers all over the world as mentioned in the Sahih Hadith. However, of these, five (sometimes known as Ulul Azmi or the Imams ? i.e. leaders ? of the Rasuls) are the most commonly revered for their perseverance and unusually strong commitment to God in the face of great suffering. These five are Nuh (Noah), Ibrahim (Abraham), Musa (Moses), Isa (Jesus), and Muhammad.'
The key basically si that the Jews don't beleive the Messiah has arrived yet (apart from Messianic Judaism which is where it gets fiddly). The Christians believe Jesus to be the Messiah. The Muslims beleive that God sent each nation a book but those books were lost of corrupted; He ahd to continue the ine of Prophets beyomg Jesus so that the true owrd could be transmitted- no more Prophets may come, as Muhammad is the Seal.
It really seems to depend on where you stop believing the newer stuff, really.