The prime issue is the culture of Jihad. Take Jihad out of Islam (arguable not possible) and it may survive. Follow in the way of Jihad and it will be a death match.
Well they need to get over the Jesus block too;
South-East Wall. Verily Allah and His angels pronounce blessing upon the Prophet. O ye who have pronounced blessings upon Him and give Him the salutation of peace. O, People of the Book (i.e. the Jews and Christians, always referred to as such by the Muslims -Ed.) do not go beyond the bounds in your religion and do not say about Allah anything but the truth. The Messiah, Jesus, son of Mary, is but a messenger of Allah and His word which he cast upon Mary, and a spirit from Him. So believe only in Allah and of his messenger, but do not say "Three" (Trinity) and it will be better for you. Allah is only one God. Far be it from His glory that he should have a son.
http://www.templemount.org/allah.html