concur. The fact that it had been a fishing trawler is completely irrelevant. It was, at the time of the sinking, a pirate ship and subject to the appropriate actions taken by the INS Tabar. Good on you India and don't back down! The issue of compensation for the loss of the ship is something for the lawyers to work out, but in my opinion the appropriate parties to the lawsuit are the pirates who hijacked the ship and then used it for their own nefarious purposes. The Thai owners should take the pirates to court (good luck with that!), not the Indian government.
Goes back to that old practical law of the sea. When you take a shot at an armed warship, plane, sub, etc. (of whatever navy), you better be prepared to suffer the consequences.