Advice for a son who has estranged his father due to a disagreement over a certain issue

Question:
He says: My younger brother is a university student. Two years ago, a man proposed to marry our sister, but we rejected this suitor because he had some characteristics that we did not approve of. However, our father insisted on marrying her to him. At that time, my brother became extremely angry about this matter and estranged himself from our father. What do you advise him to do? I am worried about him. May Allah reward you with good.

Answer:
I advise your brother to please his father, to seek his forgiveness, and to abandon this estrangement, along with offering sincere advice if possible, advising him not to marry that person.
The point is that he must maintain harmony with his father, speak kindly to his father, and be cautious of estrangement and bad manners; because dutifulness to the father is among the most important matters and the greatest of obligatory duties. If his father disagrees with him on an issue, it is not permissible for him to boycott him, nor to be harsh in his speech to him, nor to speak to him in a way that is not befitting. Rather, he must be well-mannered with his father; he should not say "ugh" to him, nor shout at him. Rather, he must speak with kind words and seek out a good manner of speaking, along with the advice he deems appropriate.

The presenter : May Allah reward you with good, and may He do you good.