Disobeying one's parents in their refusal to allow marriage to a pious woman who is not a relative

Question:
What is the ruling in Islamic law regarding a Muslim man who is single and fears the trial of women, and who has proposed to a pious woman who has accepted him, but his parents demand that the wife be of noble lineage and hold a high academic degree? Should he obey his parents, or should he be content with marrying the righteous woman?

Answer:
If he finds a righteous, suitable woman, he should marry her, even if she does not have degrees and is not known for her lineage, provided that she is righteous in herself. There is no obedience to them in this matter; obedience is only in what is good. However, he should address them in the best manner, strive to please them, and not be harsh with them. Their right is great, but he should treat them in the best way...
The guardians have the right to demand this and to know the lineage; this is permissible according to a group of scholars. However, the issue of the degree—what is a degree!—and that she be such and such, is not obligatory. As for lineage, it has validity in the view of many scholars in any case, but it does no harm whether she is a freed slave, a non-Arab, from Quraysh, or from any other group; it does no harm. [Surah al-Hujurat: 13] It is not a condition.