you all seem to intentionally miss the point, "responsible Islam" can very quickly change to "radical Islamism", given the right conditions.

How do you think the ISIL faction made such swift and rapid advances?
Anyone who follows a religion which is so intolerant of other religions, is an easy convert to radicalism, or at least tacit acceptance of radicalism.

When they are further encouraged by the knife at the throat, there is no further argument.