This all seems too political to me. I suspect the blame on North Korea is really a fishing line to upset the real person's ego to hopefully get some sort of lea

This all seems too political to me. I suspect the blame on North Korea is really a fishing line to upset the real person's ego to hopefully get some sort of lead. While I don't doubt North Korea's technical ability I sincerely doubt this is a real motive to attack Sony. Something screams ex-contractor to me and planting evidence to come from NK seems like a plausible avenue to avoid being caught.