OMG!! You ARE joking.....right??? SHe’s the MOTHER of GOD!!! Full of GRACE means SINLESS.
Our Protestant brothers and sisters (for such they are even if they deny it -- or if, as some of us do, we deny it) love the Lord whom we love. They are rightly concerned in placing all their hope in the Salvation IHS wrought and in giving God all the glory.
It is not just their failing but ours as well that we have not made our blessed Mother's case as well or as persuasively as it might be made. It does not honor her -- or, to be practical, increase the chance that they will honor her as we would like -- if yell at them for not seeing the matter as we do.
For me, that God has chosen to share His love for us in so many wonderful ways increases my joy and the thanks I offer Him. A bad argument gets my dander up, as does gratuitously offensive language (unless the argument or language are mine, in which case they are not only understandable but ,of course, meritorious). But when a good, purposeful, devout person rejects what seems to me to be a wonderful and joyous gift of God to his children, when they miss, as it seems to me, such a wonderful instance of "Grace upon grace" or of "shaken down, pressed together, running over" I think the problem is how to be more persuasive, not more emphatic.
It's probably just my problem.