Is it permissible to prevent a 68-year-old father who suffers from morbid obesity, a previous stroke, and other health issues from excessive eating, knowing that he overeats and gets angry and curses his children when prevented?

It is not permissible to be harsh with a parent, as this constitutes disobedience, and disobedience occurs with the slightest harm. One should gently manage the food situation with him and persuade him kindly, consulting specialists to give him food that will not harm him.