Clearly this was air piracy by any credible definition of the term. I also agree with 2unlimited's take on this - he is completely correct. No one is going to do anything about this. The Russian state and its security apparatus is increasingly emboldened - you just need to see the attempted murder of Alexei Navalny and his subsequent imprisonment on trumped-up charges. The crew of the Ryanair flight are just like any one of us - the captain had absolutely no choice but to cooperate with the authorities of the country they were flying over and obey the instructions of the accompanying fighter plus associated fighter controller. They are merely the fall guys here. My guess is the West will do what it always does - huff, puff, promise to blow the house down but in the end send a fax to the UN to say they are displeased. I don't imagine the Russians are quaking in their boots.