Hitler might have USED religion, but he was not religious
He said that he believed it was god's will to wipe out the Jews, and he thought it was god's will to return Germany to a powerful nation again.
He proceeded to act on what he perceived was god's will.
That makes him religious. That you find his actions he initiated under the banner of god's will objectionable is fine and dandy, but does not change the fact that he believed he was doing god's will.
Just as the Inquisitors believed they were doing god's will doing the Inquisition, and the US believed it was doing god's will driving the heathen Indians from their homes to make way for good, Christian, settlers. Or, for that matter, that those same Christians through the ages thought they were doing god's will by burning witches and heretics at the stake!
Mao did NOT believe in God, he persecuted those who did
This goes against my research. Kindly point me in the direction of something that indicates Mao specifically targetted religious people for persecution.
Near as I could find, Mao targetted those who opposed his communist state, regardless if they believed in god, evolution, or the great blue smurf.
Xander F
(Unseen Apostate Directorate of North America - Ohio order)A fanatic is one who, upon losing sight of his goals, redoubles his efforts.
--George Santayana