Is it possible to discuss/negotiate/treat with ISIS? If not, can anyone see a solution to the problem?
From my very limited view, I doubt that much can be done to stop them at present. The Middle Eastern armies are not match for them -- not because they lack weapons and training, but because they have shown themselves unwilling to resist -- and it would be another unwinnable disaster to send in Western military forces.
Cutting off their funding and their recruitment channels will inconvenience them but only until they find other ways to get what they need.
The silent (sometimes not so silent) support of radical Muslims world-wide will make sure they remain well-equipped.
Unfortunately ISIS is a part of the New World Oder's plan to take over the world and cut back on the population. The NWO also controls Obama and friends so there will never be negotiations whatsoever. The only way to fight evil like this is to face it and fight to destroy it. It wont be easy nor pretty but it's what its going to take to stop it for good and hopefully soon before anymore women and children are killed by them.
ISIS is a problem that the Middle Eastern nations are going to have to solve themselves. If any outside nations like America or Britain get involved the whole situation will become worse. Just let the Turks and Saudi Arabia take care of it. If they get mad enough a united Middle East assault will take care of it. If not then...we turn a blind eye and ignore them until ISIS dies of boredom.