One SEAL (or more accurately, the Israeli Navy version of a SEAL) with a limpet mine would make quick work of this ship.
And when the international press comes knocking, Israel could just innocently speculate as to what type of aid holes a ship’s cargo hold, sinking it.
More like what kind of sewer pipes have a high order detonation capable of flattening a couple of square city blocks is more likely . 8^>