Is it permissible for a young man to take out an interest-based loan, based on the principle of "necessities permit the forbidden," in order to establish a project after being unable to obtain Islamic financing, and is it permissible to marry him in this situation?

Necessity permits the forbidden, as indicated by the verses. However, the problem lies in defining it. It is not merely a need for wealth accumulation or launching projects, but rather a danger or severe hardship from which harm to life, limb, honor, intellect, or property is feared. Therefore, borrowing with usury is not permissible except out of genuine necessity, not for luxuries, extravagance, or business development. If the Shar'i necessity is realized, then borrowing from a usurious bank is permissible; otherwise, it is not. Lawful avenues are numerous. If one has borrowed with usury, it does not preclude marriage to him, because the prohibition of the loan pertains to his own responsibility. The engagement should not be annulled on this account if he is a person of good character and religiosity; rather, the matter should be explained to him.