Is it considered a sin to marry a committed girl whom the family rejects because she is not from the family, despite her family's approval, and the husband's belief that his family will accept her later?

Allah has made obedience to parents and kindness to them obligatory, and He has placed His pleasure in their pleasure. So, if a father prevents his son from marrying a specific woman, obedience to him becomes obligatory. Therefore, one must strive for the pleasure of the parents and try to convince them to agree to the committed girl, given that the Messenger of Allah, peace and blessings be upon him, encouraged marriage to the religious woman. If they are not convinced, then pleasing them is more paramount and affirmed.