Most Muslims surveyed would answer, "THE JOOOOS" in answer to the question in the title here.
Seriously, it's a very interesting post. It reminds me of a wretched woman at my workplace who once went to India to visit her relatives. Her teenage daughter upon witnessing grinding poverty for the first time gasped and asked, "Why mom, why! How can God be so cruel!? Waaaaah."
Her logic boiled down to: The world is not nice. Ergo, God is evil -- which quickly morphs into God doesn't exist.