It probably wouldn't have been well received earlier either, since religion was one of many subjects that network censors were uneasy with in '60s and '70s TV, for fear that people would be offended by depictions they saw as blasphemous. So references to religion had to be vague and indirect.
And really, I don't understand why you think it would be problematical today. Like I said, FOX and Netflix's Lucifer, which ran for five years and ended less than a year ago, starred the literal Devil as its protagonist, and featured God himself as a recurring guest star played by Dennis Haysbert in its final season, portraying him as a very flawed, emotionally distant father. It had also previously featured Tricia Helfer as God's wife, the co-creator of the universe, which must have really outraged the religious purists in the audience, but she was a featured character for a whole season and occasionally returned thereafter. Cain and Eve were also featured as series regulars, with Eve being a bisexual party girl who fell in love with Lucifer's female demon sidekick Mazikeen. It was like it was consciously designed to be as offensive to the Bible-thumping bluenoses as possible, but it was a hit on commercial TV for three seasons before moving to Netflix. If anything, Lucifer proves that TV today is far more permissive about religious depictions than it ever would've been in the 20th century.