No the rise of islamism is anterior to the removal of Sadam Hussein. And it happened in every muslim country, including those that were not under a secular dictatorship (Marocco, Turkey, Maldives, etc). What is true is that the topping of secular dictatorships opened the way for islamists to take power or start a civil war. But what you are saying is effectively that muslim countries should be left under a dictatorship otherwise would vote for islamist parties?