Meph It makes no sense to consider them a separate military phenomenon, except to permit our governments to continue to accept bribes (in all but name) from the very same hostile state.
Radical rooster Oh I love to tinfoil hat Brigade who claim that we need this shit happening on a regular basis so we can make money out of wars in the middle east.
Radical, I would argue that it isn't "us" who wants to make money out of wars in the ME. It's more a case of regimes wanting to remain in power and also wield power on a global scale.
It became clear that there was a significant connection between Islamist terrorism and certain Gulf States when Bandar bin Sultan threatened Putin prior to the Sochi Olympics with not being able to prevent terrorist incidents at the Games if Putin did not abandon his support of Assad. Again, it is pretty widely considered that ISIS were originally a Qatari-sponsored proxy force that the Al-Sauds "took over."
I have been inclined to see these "terrorist attacks" as part of a blackmail scenario for quite a while. Everything seems to fit: even down to choice of location and timings -- which never chime with what you would consider to be legitimate state targets.
Part of me suspects these attacks are ramping up because several Western figures have openly stated that certain regimes will not last the decade, which, in turn, suggests that some people in very high global positions of power have got very pissed off with the antics of these regimes and are sowing the seeds for their eventual removal.
Those regimes are responding by basically threatening the West through terrorist attacks from their cleverly-created fifth column. With this in mind, it becomes very clear why Saudi Arabia wanted to build hundreds of mosques in Germany and why certain forces may want the migrant crisis chaos to continue.
The problem is that certain gulf states are incredibly powerful because they can control energy prices and can play at harmless allies to the West because they have no substantial conventional standing armies (unlike, say, Russia or China). Saudi oil production increases have fundamentally smashed the Russian economy by crashing the oil price, for example.
Now we face the consequences of foolishly letting these regimes infiltrate Western Islamic communities with their not only their Wahhabi garbage but also their political propaganda.
It is a fucking mess. It really is.