A: Because Islamic tolerance is a myth

Q: If Muslims seek to convey to non-Muslims that Islam is a tolerant religion, why, for instance, are many of the world's Muslim leaders, allegedly the most pious and knowledgeable, also the most hostile toward non-believers? Why do non-Muslims face significant discrimination, even in the Islamic world's most moderate nations? It is by their own behavior and their own admission that the Koran incessantly distinguishes between believer and non-believer and calls for unequal treatment of the two. Is it all simply a matter of interpretation, or does the sustained prevalence of barbarism reveal something inherent about the Islamic faith?