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.