Scheme difference.
When you think this world is all we get, it hurts a lot when people take your stuff and beat you up. Your stuff is a measure of your success in life, and crippling you cripples your ability to earn more stuff and increase your measure of success.
When you know there's more to life than this world, it doesn't matter so much. We know we're going to lose it all anyway when we die, and even if we could take it there would be nothing to do with it in Heaven anyway. We even get new bodies there. Anything someone can do to us down here doesn't really seem quite as important anymore.