If Our Lord is both fully human as well as fully divine, I don’t think that anyone is bound to be closer to him than his own Mom. I’m thinking, if she’s anything like mine, I’ll put money on her any day.
I seriously doubt that, short of not living up to the ideal that he left us with, there is very much you or I or anyone else could do to “insult” our Lord’s sacrifice. That’s the point of the sacrifice in the first place.
Thye Blessed are in heaven with Christ and form part of His Mystical Body. The intercession of saints is in Christ and not apart from him. The saints are not separate gods. Jesus is the one divine mediator, being both God and man, and the saints are but ways to Him. Also, you should be ashamed of your calumny against Our Lady, who was born and preserved from taint of original sin in anticipation by the merits of Christ's passion. I understand herr Luther had a strong devotion to Our Lady, but that seems to have disappeared somewhere along the way among you die hard Protestants.