deism was little more than a fig leaf over atheism to begin with, but paine left that plenty far behind - "the age of reason" was principally anti-christian, yes, but his point was that all religion was bullshit, certainly any sort of organized religion
"I do not believe in the creed professed by the Jewish Church, by the Roman Church, by the Greek Church, by the Turkish Church, by the Protestant Church, nor by any Church that I know of. My own mind is my own Church."