Devotion to Mary has no place in Christianity. We shouldn't pray to Mary or recite the Rosary. That's idolatry. Mary is not our mother. She didn't remain a virgin. She's not the Queen of Heaven. She has no special power, place, or authority in Heaven.
Catholics aren't Christians. We're saved by faith alone in Christ alone guided by the Bible alone. We're not saved by infant baptism, good works, and obedience to church rules.
RE: Unity of Christians