Re:
Inside Man. Honestly, I didn't get the whole OMGWTFHOWEEEVIL bit, either, but then, I didn't that much perceive it as preaching, really. Obviously, my ideals and the ideals of the bank robbers differ, but I can live with that, especially with the introduction of "why? because I can".
Honestly, I can only stress that I truly found that was the main reason, emotionally, and that the rest are actually trivial extra bits.