it is the aggressive moves that led to this. >> kuwait became the latest country to sever diplomatic ties with iran. joining me now, richard engel in istanbul. this is now involving a half dozen countries. >> reporter: it's more than a regional dispute. it's a profound religious dispute, an et nick dispute, the arab divide, the shi'a divide. this is the divide causing many of the problems in the middle east flight, and one of the root causes of isis. frankly, it is the last thing that washington or anybody needs at the moment. right now there are calls for international consensus for the great powers of the middle east, which include iran, which include saudi arabia to get together to fight against the