score:3
There seem to be no records of the specific theological basis on which March for Jesus was founded. However based on its priorities and aims it is easy enough to discern general theological principles for the event.
The founders (like many Christians) are coming from a theological traditional where it is not necessary to find specific biblical approval for something as long as it is in accordance with Biblical principles. The general purposes of March for Jesus are well supported in scripture:
Since there is a 'vast theological basis' for these activities, the founders take the view that there is nothing wrong, and much that is right, with adapting them to a present-day form.