By using trade and commerce and 'natural migration' as an excuse, these Islamic invaders plead for tolerance and their rights when they are a minority in a Christian country.
Through an increase in their numbers, facilitated by high birthrates and increasing immigration, they quite quickly become sizeable enough in numbers to start demanding changes to the countries that they have invaded.
If those changes — and the Islamic society that they demand — are not acquired quickly enough, the Islamic terrorist element begins to force those changes.