Historically, Islam has been an enemy of the Church. It conquered large parts of the Christian world and, on several occasions, it advanced far into Christian Europe. Moreover, these conquests and attempted conquests were motivated not only by expansionist ambitions but also and primarily for religious motives. Christians were infidels and Allah and his prophet commanded that unbelievers must be subdued.
Islam still wants to conquer the Christian world and, in particular, Christian Europe. This time, however, the battle plan is different. Instead of an army of soldiers, Islam has deployed an army of migrants. This army has encountered very little resistance on its march through Europe. Indeed, for the most part, it has been welcomed by the authorities and subsidized by them.