All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
The verse that you are referring to is the saying of Allaah (which means): {O mankind! We have created you from a male and a female, and made you into nations and tribes, that you may know one another. Verily, the Most honourable of you with Allaah is that who has At-Taqwa (God's fear)}[49:13]. This verse affirms that all mankind are equal, and that Allaah does not look to our race or colour, but to our piety and righteous actions. Being of a different race or colour is only in order to know each other. That's why according to the most preponderant opinion of the scholars what has to be taken into account as a characteristic for the suitability of marriage is religion and good moral character. The Prophet
said: "If a person whom you are pleased with his religion and moral character proposes to you for marriage, then you should give her in marriage." [At-Tirmithi] So if a given society does not apply this principle, corruption will be widespread and the number of spinsters will increase. Therefore, it is not permissible for parents to refuse qualified and suitable men who seek to marry their daughter. It is also not permissible for a guardian to oblige his pubescent virgin daughter to marry someone she does not want to marry, according to the most preponderant opinion of the scholars
. There is no harm if the sons suggest to their father whoever is more suitable and qualified to be an accepted fiancé.
Allaah knows best.