While, from an outsider's perspective, Islam has had its share of splinters and factionalism in its past, Islam has not yet suffered its great upheaval, denial, disillusionment, search for meaning, angst and ultimately abandonment that Christianity suffered through the age of enlightenment.
Seriously, all the horror that is perpetuated in the name of Islam reminds me of the crusades. And all that nonsense should have rightfully ended in the middle ages.