Protestants have historically held Mary in high regard as a godly and highly favored woman of God, a sinner saved by the grace of her divine Son.
Catholic dogma, on the other hand, has exalted her in an irresponsible and idolatrous way. She is declared to have been free from all original sin (the dogma of the Immaculate Conception, first declared in 1854; Catechism 491-492), free from any actual sin during her life (Catechism 411), and perpetually a virgin even after the birth of Jesus (Catechism 499-500).
Mary… was redeemed from the moment of her conception… preserved immune from all stain of original sin.
Mary remained free of every personal sin her whole life long.