i would say that the big diff between chirstianity and islam is that most of chirstianity had the extremism beaten out of it between 1000 and 1600 or there about.
on the other hand, islam is just hitting that age of strife (the religion got going around 900 iirc).
and while the "bending knees and wrapped women" style makes for a lot of press, there are as many of not more that deal with islam as most of europe deals with christianity. a starting point for a moral code, but not something that one follow by the letter.
question is, can the rest of the world hold out while islam gets its collective pubertal rebellious energy burned?