HH:-
Just why we intend to get into a snake pit where everyone else has a dozen agendas is beyond me...
And me too, if it's of any consolation. All these heavily armed jihadist outfits; Al Qaeda, Boko Haram, ISIS, and half a hundred others, are all proxies of those in Saudi Arabia and certain other Gulf countries that are united in their religious fanaticism and hatred of the unbelievers.
If we are prepared to attempt to interdict the ISIS income stream, be they fuel convoys or whatever, wouldn't it be more logical to go to the root of those streams, ie the wealth of the Gulf States which is oil based? Unless and until we are prepared to do that (via a UN authorised trade embargo?) we are merely sniping at the edges, and there will be even more attacks on cities, air transport, and anything else that they choose. The governments of these states might well be held in thrall to these extremists, but they should be forced to choose between responsible governance or overseeing a rogue state. If the latter they should be isolated like N Korea, South Africa (as was) and Myanmar (as was), until they in turn become an (as was)..
Filling up at the pumps may seem cheaper than it was, but in reality the cost is becoming totally unacceptable.