I am well aware that it is rather late to talk about the Flotilla, and I should have posted on this earlier. However, it comes to my mind that since I did the work, I should link it here. So this is my juridical analysis of the Flotilla Incident, and this is the PDF version of the same. I shall simply quote myself, and copy the conclusion of the work, for the TLDR generation:
Israel has international liability on the basis of the articles on the Responsibility of States for Internationally Wrongful Acts, for breaching, inter alia, its international obligation not to interfere with the freedom of navigation of other states in international waters, for instituting
an illegal blockade, for intercepting and attacking foreign shipping without regard to applicable principles of IHL, inter alia, distinction, proportionality, and precautions in attack, for illegally capturing foreign shipping, and for illegally holding goods not subject to capture under relevant IHL.
I’m afraid you’ll have to read the full report if you want to understand fully how I reached those conclusions, but that is rather inevitable.