What Islamic states do is of little connection to what a modern Muslim (not really an average one yet, but slowly getting there) thinks or does. What they decide in Saudi Arabia (the closest thing Islam has to a centralized religious authority) doesn't have to be accepted by Muslims around the world. Indeed, since Saudi version of Islam is a particularly unimaginative and literal one, quite a few don't agree with them, even if they are Sunni. Much like being a Catholic does not mean you're agreeing with Vatican on everything. Most Islamic states happen to be in a generally primitive region, where bigotry is the norm rather than an exception. It's their geographic position and history that are the causes of this, not religion, and if a Christian state was in the same region, same things would probably happen there (as the C.A.R. example showed). Really, in all those conflicts, religion is just another excuse. Ethnicity, nationality, sexual orientation have all been used that way as well.