Many years ago Will Wilkinson said this about democracy: “Democracy is a genus, not a species. Getting a democracy is rather like getting a 'mammal' for a gift. Kittens are nice. Wolverines will lunch on your eyeballs. You don't drop a wolverine in your friend's lap, and then walk away feeling you've done him a favor, since ‘the best pets are mammals.’”
Furthermore when one reads the Qur'an and Hadith one realizes that Islam is absolutely incompatible with secular, liberal democracy in the style of the US and the west.
In the west we tend to see religious systems and political systems as separate (or at least separable) entities, but in Islam the state IS the church and the church IS the state, there can be no separation the entire concept is considered heresy.
You can have a Christian or Jewish society living under a secular liberal democratic government, but you really can't have an Islamic society living under one ... if its democratic the Muslims WILL eventually vote in a totalitarian, Sharia based government.
So its not a matter of rejecting optimism here, its a matter of viewing the world through the lens of objective reality, not pie-in-the-sky self delusion masquerading as "optimism".
I have to admit I find it kind of amusing (and frustrating) that back when "Chimpy McBushitler" was in office, the left and the MSM (I know, redundant) were very vocal that the idea of trying to spread democracy in the Arab/Muslim world was foolishness...destined to fail. But now that their Obamassiah is in office they're all for it. They also ignored all the conservative voices that were trying to tell Bush that the Islamic world would never embrace secular, liberal democracy.