Obama , does Muhammed have anything to do with Islam?

Obama says Isis has nothing to do with Islam. It is understandable he would lie like this since his father is Muslim and his brother runs Muslim brotherhood terrorist group in Kenya. Would he say Muhammed has nothing to do with islam? Isis is drawing policy right out of Muhammed's life.
SLICING OFF OUR HEADS: The Koran tells how Mohammed made a peace treaty with the Jews of a certain city in the Arabian peninsula. But within two years, he found a pretext to suddenly break the treaty, attack his surprised victims, and then behead all the Jewish men in the public square. Mohammed's tactic is held up by the Muslim Arabs as a hallowed model. It is enshrined in Muslim legal practice which has it that Muslims are not obligated for long to honor peace treaties with non Muslims -- infidels. It is not the 800 Jews of Medina [slaughtered by Mohammed in 627 AD], but millions of infidels slaughtered in subsequent centuries that should make us pause and reflect. Not only that. Those who defend Mohammed should reflect on the fate of the millions of infidels for whose heads the mujahid's knife is being sharpened in all Islamic countries right at this moment. and as for sex with children:When she was 6, Muhammad asked Abu Bakr, Aisha's father, for her hand. Abu Bakr thought it was improper, because, as he said "I am your brother"; Muhammad brushed aside Abu Bakr's reservation by saying that it was perfectly lawful for him to marry Aisha [ Ref: SAHIH BUKHAR I7:18]....So, Aisha was betrothed to Muhammad, and 3 years later, i.e. when Aisha was 9, the marriage was consummated. And Muhammad was 53 then [SAHIH BUKHARI 5:236,7:64,7:65,7:88] .