kbertsche
Marcion's beliefs were one set of many circulating in those days.
The impetus you speak of was created by the many gospels and not any particular one.
There were many mystery schools in that day and Constantine wanted just the one belief system where Jesus was both man and God so that Constantine, like many Emperors before him, could claim God status for himself.
He died before he could firm all that up.
Regards
DL
Edited by Greatest I am, : No reason given.