What is the ruling on the harsh words uttered by the questioner to his mother due to his defense of the Mujahideen whom his mother cursed, and what are the consequences of that?

Parents hold a great status, and it is obligatory to honor them and treat them with kindness. The mother's right to honor is even greater. If a mother commits a wrongdoing, it is incumbent upon her child to enjoin good upon her and forbid evil from her in the best possible ways. Retaliating to her misdeeds with misdeeds is an act of disobedience. It is obligatory upon you to obey your mother and repent for any words that may have angered her, and to continue honoring her and treating her with kindness, without relenting in seeking her pleasure.