Shaykh Ali Hasan said ” It is a must here to point out something.I have heard some information transmitted to me that some of the people of knowledge have issued a fatwa saying that(Islamic) organisations are absolutely Haram.
This ruling in reality has no basis from any aspect and is not correct from any aspect,nor has it got any foundation because the affairs are not known by names or nicknames the affairs are known by their reality
so if a hizb does not describe itself with hizbiyyah,Does this nondescript negate its reality?The answer is no!
Likewise an (islamic) organistion if it does not specify walaa wal Baraa for its sake and it is just used as a means to organise affairs with the legislated cooperation and enhance the islamic brotherhood and it does not put forward except whom Allaah and his messenger has put forward or the one who puts himslf forward (in decisions) before Allaah and his messenger, nor (does it put forward) the one who distances himself from Allaah and his messenger or the one whom Allaah and his messenger have distanced himself from(then there is no prohibition)
Translated and summarised by Jafar ibn ruel Jeffrey