Dawa is to the Islamists of today what the “long march through the institutions” was to twentieth-century Marxists. It is subversion from within—the abuse of religious freedom in order to undermine that very freedom. Another analogy is also possible. After Islamists gain power, dawa is to them what Gleichschaltung 6 (synchronization) of all aspects of German state, civil, and social institutions was to the National Socialists.
Source: THE CHALLENGE OF DAWAA…