I'm not talking about myths under a precise definition (as in stories to make sense of the world), rather mythology in the rougher sense of the way we think about our ancestors and people from the past (in the vein of "the good ol' days" or in contrast "the dark ages")

also, "who is trying to influence" seems to imply some sort of distinct actor (with agency) doing it based on some definite agenda.

but I don't think this is the case; as some other comments point out, it's closer to a dynamic. it gets fashionable so everybody does it never mind the fact that the next generation of people will inform their beliefs about our ancestor's lives based on this romanticized versions. so in a sense "cultural ideology" is the "agent" behind this.

finally, answering how does this affect our future is not so easy. I said it because knowing our past (our history) allows understanding our present circumstance. and based on this we are able to visualize our future. If I could explain this better I could probably also answer why is there historical revisionism

But how does this relate to the article?

my original post answers the question posed by its title (but in an unrelated way)