Okay - here is the scripture: "EVERYMAN has been given A MEASURE OF FAITH".
Why does everyman need "a measure of faith" - in order to believe Jesus is the Son of GOD, our Savior.
But .. in Deut. 28-29, GOD clearly says, "I've set before you blessing and cursing, NOW YOU CHOOSE".
That wouldn't be classed as a "genetic" propensity