In a baseball game there are players at all different positions. If you remove one player at a time from the field, each removal will weaken the defense against the opposition. The same thing is true in other sports. In a chess game the objective is to take pieces from the opposing player in order to ultimately capture the king.
It has become obvious to me, that there is at this time no possible way to settle the Palestinian question. Years ago associates of mine tried to involve me in an organization called "Peace Now". It was one of many groups that sought to provide a specific methodology for bringing peace to the Israel/Palestinian confusion. I didn't agree with the "Peace Now" plan then, and up until now it seems to have been totally wrong.
ISIS, Hezbollah, Hamas, Taliban, Fatah, Muslim Brotherhood, etc. appear to be different groups with various positions on one issue or another. Yet each one of these groups are acting collectively as one team, prepared to take on whomever chooses to challenge them. If one group (player) withdraws from the field by settling differences with Israel, United States, etc. the entire group (team) is weakened.
Consequently it is becoming obvious that a settlement from any single terrorist related group will not occur in any time frame relevant to current attempts.