In his column, Why Are Atheist Books Best Sellers?, Dennis Prager gets a lot of it right, but I think there is something else going on.
In our Technological Enervation and secular arrogance, I believe people without faith are jealous of ones who do have it. We with faith have an anchor in life outside of ourselves. I believe that the reason that atheist books (including, “The Secret”) are successful is that they provide (dead) comfort to people who feel the emptiness in their souls for which they have no answer, and are afraid (or angry) that those with faith have an answer.
I am not saying that Muslim extremists (or Islamacists) necessarily have a deep faith either. I would almost suspect that it is an attempt to quell that very emptiness that the atheists have. I don’t know, and I won’t know until I can talk to God in Heaven. I know that my human conditioning often puts too many barriers to my understanding of God’s creation. Mercifully, He gave us his Word. Read it daily in love.