I don't know. If you wanted to dismay your friends and add a few new enemies I don't think you could do much better than Israel did yesterday morning. AS I understand it, in international waters (aka the "high seas"), you are governed by the laws and regulations of the country whose flag you are flying/country of registry of your vessel. You can be boarded by the authorities of that country but in theory no-one else.
If you are flying no flag/do not have a clearly defined country of registry, then you are de facto a pirate and can be boarded/challenged by any naval vessel.
Those Turkish ships hardly fall into either category vis a vis the Israeli navy. Attacking vessels on the high seas is piracy, isn't it ?
It's not as if the boats were carrying arms. Cement isn't a deadly weapon. And no matter who did what on the boats, the IDF had no right to be there at all.
"Where's the streetwise Hercules to fight the rising odds?"
35 minutes ago