>>20149261They do it because of something Irenaus said. He declared Mary was a co-redeemer, next to Jesus. So they worship both of them as redeemers. Over the centuries, it's turned much more into a Mary focus likely because the issue has rightfully become a point of contention in the Christian world. And people tend to rally around aspects of their tribe that get attacked. So now it's a Mary worship religion with Jesus iconography and lip service.