Death is something inevitable. When a man has done what he considers to be his duty to his people and his country, he can rest in peace. I believe I have made that effort and that is, therefore, why I will sleep for the eternity.
With or without religion, you would have good people doing good things and evil people doing evil things. But for good people to do evil things, that takes religion.
A person who never made a mistake never tried anything new.