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ISIS and Al Qaeada both are not muslims or chistrance these are just culprits of current worlds politics and just because of this we have many problems around the world these are working for worlds amunations industry as these need to sell their stocks so they use organizations like these for this all without any religion or any other thing.
Actually, yes they are definitely sects of Islam and there are hundreds more sects of Islam that tend toward violence. ISIS and Al Qaeada are simply a couple the media have focused on.