Yes. And the whole world should join their forces.
We have come upon an enemy whose plan is the total assimilation and/or destruction of those who oppose them. They will never stop unless we do something about it. The chaos they have caused is now spreading all around the planet. If we don't act now, they will keep growing. We must stop this at once!
The problem is that they are mostly active in countries who lack sufficient funds, armament and manpower to eradicate them. Plus, the governments in these regions are quite unorganized, if not incompetent or careless. Rich countries have a responsability to help the civilians who are left with close to nothing and are being subjected to atrocities. It is our duty as human beings to protect other human beings to ensure the human race can keep going forward, and send a clear message that we are all united against extremist groups such as ISIS. And if we must violate the sovereignty of certain countries who are financing them by doing so, then so be it.
Whilst it can be true that in the past UK/US armies have caused chaos, we must not forget that the lack of direct actions can also lead to chaos.