Paine is not an atheist. Far from it. He emphasizes that he is a deist, one who worships the God whose book is nature, rather than the Bible, which he tears apart as savagely as any New Atheist, and shows it to be the work of humans.
Some of his arguments are dated, and some don't stand up to scrutiny, but in the main, it's remarkable how well most of them have aged. He cites the same Bible contradictions, absurdities, and atrocities as people today.