But you seem to be glossing over the very real blood shed and oppression between Islamic tribes down through the centuries across the region. There were plenty of occasions where violence was sparked between rival caliphates. Plenty of occassion where tribes within Islam were suppressed for the greater good of Arab empire. Of course, then there were the "purification jihads" on the Arabian peninsula where religious structures were destroyed and non-adherents to Sunni Islam were slaughtered. And are you aware that Islamic extremists for a century have murdered far more of their own Muslims than Westerners? By all means, enjoy criticizing Christianity, but don't do it while glorifying an ignorant perception of Islam.
Living in "peace" in the Islamic world meant certain taxes for being non-Islamic. It also meant certain restrictions on religious freedom and structures. In other words, as long as they behaved and followed the rules, they were "tolerated." Did you know that in Saudi Arabia today, the Shia are denied the right to name their children certain names that might offend the Sunni tribe? And that they are denied certain religious freedoms? And that they are held to different laws than the Sunni? And that the House of Saud is famous for funding thousands of schools throughout the world and the fundamental base of these schools is to legitimize the Sunni school of thought? Some would call such things oppression or age old colonialism within the Islamic world. I guess others call it "peace."