Unless we want to debate Cyprus again here (which I'm sure no one wants to do) it's a lot more complicated than this. You obviously need to go into the 1950s and 1960s etc. But one simple complication I would throw in is that the greater part of the invasion and ethnic cleansing/voluntary exodus (whatever you want to call it) happened on August 14th, 1974. The coup had been over for more than 3 weeks. It was a short-lived coup, just 3 1/2 days. The democratically elected government had been restored in July. The Greeks and Turks were at a peace conference for 2 1/2 weeks already in Geneva. During the peace conference, Turkey launched operation Attila. There really is a reason why the world unanimously condemned the invasion, and why the UN resolutions against it exist to this day, and why even the USA imposed an embargo on Turkey. Heck, you mentioned the UK, and the UK has always been the promoter of Turkish interests in Cyprus precisely to avert Cypriot independence, and the invasion as launched on August 14th turned the UK gov't around 180 degrees.

I don't doubt that Greece feels it needs this weaponry to protect against Turkey, but I do question how much they need, and I would especially note that lots of gov't officials--especially in the military--have accepted bribes from military contractors, which naturally throws any strategic military planning out the window and makes it all suspect. If Cohn-Bendit is making it seem like the Greek politicians are not a party to the fleecing of Greek citizens when it comes to military spending, he's dead wrong.