However , the Ba'ath Party 's organizational superiority worked in its favor ; with Attar 's enforced exile , the Muslim Brotherhood was in disarray .
After Siba'i's imprisonment , under Isam al - Attar 's leadership the Brotherhood developed into the ideological antithesis of Ba'athist rule .
The Ba'ath Party 's organizational superiority worked in its favor ; with Attar 's enforced exile , the Brotherhood   was in disarray .
After Siba'i's imprisonment , under Isam al - Attar 's leadership the Brotherhood developed into the ideological antithesis of Ba'athist rule .