The reason for allowing the 'muslimization' is precisely to introduce a real threat into the population.
That way one has a constant state of fear engendered into the population- and fearful people turn to the 'government' to protect them ... no matter how much of their freedom they have to give up.
It is a formulae, diabolically implemented, that has proven to be pretty damned effective.

Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good ...