Muslims - Several questions...?

The book of Revelation was written several hundred years before the religion of Islam even emerged, and yet muslims try to claim that Christians purposely made the "al-mahdi" the "antichrist". But my question then, is why isn't muslim, islam, muhammed, al-mahdi, or any other muslim related person or term used in Revelation, or in the entire Bible for that matter? Why when Jesus came preaching only peace and love, 600 years later God sends a man preaching hate and violence intermingled with small bits of peace and love? When did God's chosen people go from Isaac to Ishmael? ("Gen. 21:12 And God said to Abraham...in Isaac your seed shall be called") Why does Islam hate the Jews and Israel so much? Is it not coincidence that the devil also wants to rid the world of Jews (Hitler/nazis, many other persecutions against Jews). Is it coincidence that the Jews are even still in existence, and on top of that, a nation again? If God hates the Jews and Israel so much, then why didn't he let Hitler take care of them? Why are they still here? Why did they become a nation again and take back Jerusalem? Is it not odd that Islam denies the one most prominent fact about Jesus out of the New Testament, that He is the Son of God, but yet incorporates other things about Him from the same New Testament into their beliefs?