Except Walid Shoebat and others ( see below) point out that the assassin yelled a muslim brotherhood phrase and ISIS , while cooperating with muslim brotherhood , are not card carrying members of the muslim brotherhood
there is leadership chasm between them over fatwas and the legitimate leadership of the “ caliphate” among other issues
The MB has been around a lot longer than ISIS
Would ISIS like to claim taking down a Russian ambassador? Sure. Would that mean Abu Bakr al Baghdadi planned and ordered the hit? To embarrass his frequent Turkish host Erdogan ? Seems a bit off
So it would be premature to attribute this guy to being ISIS given the MB oath he yelled after shooting the Russian Ambassador
And of course we the USA have muslim brotherhood members entrenched in the WH and throughout our govt so what does that say about our security ?
https://www.middleeastmonitor.com/20140921-the-muslim-brotherhood-and-is-are-not-the-same-thing/
You could be right vis a vis ISIS vs MB. Both, IMHO, are FOO (Friends of Obama) so I tend to just lump them together.
In the long run there will be a pretty good fight between ISIS, the MB and Turkey as to who deserves to be the leader of that wonderful Caliphate that these guys all dream about.
Hopefully before it comes to that Trump will suppress ISIS, fire the MB hired by Obama and read the Riot Act to Turkey and things will calm down in the M.E.