This is nihilism. Nihilism rejects the good as such, heavenly or otherwise. The saint who pursues heavenly bliss through pious observances and good works wins zero credit from a nihilist. Nihilism credits no-one who seeks, upholds or defends any good whatever. Nor can nihilism merely be indifferent to good, as is recommended by some codes.
Nihilism is active evil with delusions of righteousness.
So were Fascists. So were Communists. They all regarded themselves as moral idealists. This is a mystery to those who don't understand nihilism. Crusading evil is the curse of the 20th century, not only in politics, but in field after field.