His violence is self-defense.
Here’s Muslim Bassam Tibi on Islamic peace:
“At its core, Islam is a religious mission to all humanity. Muslims are religiously obliged to disseminate the Islamic faith throughout the world. “We have sent you forth to all mankind” (Q. 34:28). If non-Muslims submit to conversion or subjugation, this call (da’wa) can be pursued peacefully. If they [...]