The Ruling on Dealing with the Shi'ah in Worldly Affairs and Creed

Question:
The questioner asks: What is the manner of dealing with the Shi'ah?

Answer:
Dealing with them in worldly affairs, such as buying and selling, is permissible. It is permissible to deal with the Shi'ah, the Jews, the Christians, and the disbelievers in worldly matters according to what Allah has made lawful, such as hiring, selling, and buying. Riba (usury or interest) is not selling or buying or hiring; this is all permissible among people except for what Allah, Glorified and Exalted is He, has forbidden. So riba is not lawful, not with the Shi'ah, not with others, not with the Jews, and not with the Christians. Riba is forbidden, forbidden in every situation. Likewise, betrayal and deception in buying and selling are not permissible with anyone, not with the Jews, not with the Christians, not with the Shi'ah, and not with others. Deception, trickery, and taking people's money by false means are not permissible.
As for dealing with them in terms of creed, you must cut off relations with them and distance yourself from their deeds and their beliefs. In fact, you must oppose them on account of them, cut off relations with them, and distance yourself from them. Yes. The questions have ended, O Shaykh. And Allah the Exalted knows best, and may Allah send prayers and peace upon our Prophet Muhammad, and upon his family and all his Companions.