It has long been the practice of "insurgent, or revolutionary" political organisations to be comprised of political and military units. This was true, for example, of the IRA and Sinn Fein.
Nowhere is this organisational structure more prevalent than among Islamic Terror organisations. The benefit of this kind of organisation is that it permits the poltical wing access to money and media exposure, and allows it to position itself, thru lies and spin, as it deems fit, all the while remaining legally isolated from the crimes commited by its military wing. It even affords the political wing the opportunity to deny any ability to exert command and control over the military wing. For example Hamas has the Izz ad-Din al-Qassam Brigades. The PLO has the al-Aqsa brigades.
The Muslim Brotherhood, "who disseminated Hitler's Mein Kampf and The Protocols of the Elders of Zion widely in Arab translation... "created a military wing called the secret apparatus".
Does anyone know the current name of the military wing of Muslim Brotherhood? Today, the Muslim Bortherhood is a transnational political organisation..and one of it's military wings is the transnational terror group al Qaeda.