Call me a tin-foil hat wearer, but I believe the Secular Athiests are secretly in league with the Islamists. Its hard to get someone to convert to Islam who is already an established Christian or Jew. Its much easier to convert someone (or some group) who believes in nothing.
That hasn’t been my experience. My experience is that once you convince someone that there is a “higher power” then it is much easier to convince them that the details of this religion are more attractive than the details of that one.