I get that our propensity for wishful thinking made it easy to underestimate the post-revolution popularity of Islamists, but their rise shouldn't have been that much of a surprise.
In Egypt at least, the Muslim Brotherhood had a number of pretty significant advantages compared to liberals and secularists. Whereas Mubarak basically crushed secularist dissent, he seemed to tolerate the Muslim Brotherhood (on a very short leash) for use as boogeymen. They were also able to organize in mosques, which were more or less untouchable, whereas nobody else had such a safe place to organize. Finally, the Mubarak regime was largely secularist, which tainted other liberals by association.
The end result was that, after the revolution, the Muslim Brotherhood had a very well-organized political network ready to go, while everyone else was going, "Hmm ... time to form a political party. How do we do that?"
In Egypt at least, the Muslim Brotherhood had a number of pretty significant advantages compared to liberals and secularists. Whereas Mubarak basically crushed secularist dissent, he seemed to tolerate the Muslim Brotherhood (on a very short leash) for use as boogeymen. They were also able to organize in mosques, which were more or less untouchable, whereas nobody else had such a safe place to organize. Finally, the Mubarak regime was largely secularist, which tainted other liberals by association.
The end result was that, after the revolution, the Muslim Brotherhood had a very well-organized political network ready to go, while everyone else was going, "Hmm ... time to form a political party. How do we do that?"