Catholics do not worship Mary, they revere her. Also the 10 commandments do not apply to gentiles, they only apply to those who are descendants of Israel.

It's certainly heresy and borderline blasphemy as they pray to her and believe she has the ability to hear them and 'intercede' on their behalf - abilities equal to Christ's own divine abilities. They also teach she was, retroactively, born of a virgin birth equal to Christ. Sacrilege and heresy. 

Go to a mosque or a synagogue and ask for food money

Because the people who are Christian end up having children who grow up Christian (most of them, not all).