It's Christ who crushes Satan's head NOT Mary.
Here is the Hebrew word for He - ה֚וּא
Here is the Hebrew word for she - הִ֛וא
Look at the mark under the last letter in each. Then look closely at the middle letter in each. Notice the difference? Not too tuff is it? You say " people in the Catholic Church who have been doing so for a little while, too". How long did it take you to see the difference? Get my drift?
And yes is a reason to fight aginst each other because it IS the enemy who would have changes made to scripture.
Sigh.