The first law of human affairs is force. Before all other laws, the ballot box and appeals to reason is that primal law that enforces submission through violence. Islam is a religion built on that first law, forcing everyone to choose whether they will be the oppressors or the oppressed, whether they will be a Muslim or a Dhimmi.
The organizing force of Islam can be seen in urban gangs which react in much the same way to being 'disrespected'. When your religion is little more than an entitlement to be a thug, to elevate your way of life over that of everyone else, violent outrage over even the most minute sign of disrespect is to be expected. And when your beliefs are little more than an excuse to hate, rioting over a slight is the sacrament of your faith.
Islam did not expand through the persuasiveness of its illiterate child abusing founder, at least not beyond the initial persuasion that allowed him to gather bandit troops to raid, murder and enslave the multicultural peoples of the desert until there was nothing left but Muslims and their slaves. It expanded by force and it has gone on expanding by force. Faced with advanced civilizations, it has reacted with the violent petulant fury that is its spiritual heritage. More