It is not hidden from you that the situation in Afghanistan involves multiple parties, including some Sufi parties that have been declared disbelievers—Allah knows best—apparently.

The questioner : ... A few days ago we were in Afghanistan ... a specific issue, and some ... said: It is not hidden from you ... in Afghanistan there are multiple parties, including some Sufi parties that have been declared disbelievers—Allah knows best—apparently. So some people there say: We seek their assistance in order to achieve a greater objective, which is ... or liberating Afghanistan from ... communism. So what is your opinion, O Shaykh, regarding the statement of these people?

The Shaykh : I see no objection to this, provided two conditions are met:
The first is known: it is the one you referred to, which is expelling the atheist disbeliever from the lands of the Afghans.
The second is that these Sufis must be the minority, such that it is not conceivable that they will have power and authority in the future. This falls under the category—as we mentioned or hinted at earlier—that some jurists call choosing the lesser of two evils when a Muslim is caught between two harms. This is of that nature, and Allah knows best.