AQ *is* the Muslim Brotherhood, that is, they all came out of MB. Zawahiri was MB before AQ got a name.
And there is extremely good evidence that the AQ organization was formalised and set up by the Saudi government as much as bin Laden.
Yes, I know. Thank you. Not sure about the Saudi government setting up AQ proper, but certainly sent jihadis to help in Afghanistan during the war with Russia. Elements of the Saudi regime are very sympathetic to AQ...others not so much. AQ was set up,after the Rusian Afghanistan war and one of their missions is to remove the regime in SA.