People tend to assume that proving a God means proving their particular version of God,
Competing mythologies and draconian measures of stamping out the pagan competition is the way In which monotheism of Jews and christians took hold and were able spread.
Systematically destroying pagan shrines and temples Across the land is not what one would call conversion through 'Faith'..
Then you had the effects of later Roman emperors Converting to christian,..making christianity more Like an imperial cult or state religion.
Without Constantine Christianity would not be the religion it is today. Nor would there be a bible.
