Busby was deeply religious and I know from an ex youth player who was at the swamp at the time that he expected them to attend church/mass on a Sunday.
It was no coincidence Busby was followed by Frank OFarrel who was also a strong catholic.
In them days they also attracted huge support in Malta, a strong catholic country.
Also remember my old fella joking white smoke would appear from the chimneys in Trafford Park when the rags appointed a new manager, although my old fella had no time for religion.
Take away the rivalry and banter, I liked Busby and respected him, as a football manager and a human being.