A saved person who has the indwelling presence of the Holy Spirit is not going to be blaspheming Him.
Anecdotal incoming, I have seen beautiful Christians justifying serious sins they were proud of (Adultery/marrying their adultery partner, abandoning their children, wife swapping within the congregation where two couples divorcing their spouses and then marrying the other partner while their kids become emotionally numb, embezzlement, ect...).
P.S. all these people were in the good graces of their Church and Pastor because they confessed their sin (But auspiciously refused to repent and laid blamed mind you of their actions for some reason while the damage still lingered).