Before Christianity people could believe in different Gods without being wrong. Paganism differnet religious beleifs were mostly tolerant of each other, no one was running around saying the one true belief system and everything else was just totally wrong. In this aspect Christianty is intolerant of otehr beleifs. It;s single megalithic belief system that if it;s true all other religions must be false. Rleigions did not have universalist absolutist claims. Gods were quite flawed, and while worshipped they were not the orgin of laws and set way of behaving. Chrtiatiny god becaome perfect, and quite dictatorial compared with previous gods, he dictated a set of laws, he was all knowing (total nowledge) and all powerfull, (total power) the source of all good things (total goodness) in all his aspects he has totalness. Before christianaity there was not the idea of dctrine and dogma. That people had to sign up to realivitively narrow set of allowed religious beliefs deivation from which was heresy.