Israel should want to know more than what the law is: 1. What intelligence was there about the passengers and cargo? 2. What options were there for accomplishing the Israeli goals? 3. How and why was it decided that the helicopter raid method should be used? 4. Were the troops trained well for the mission, including awareness of possible civilian responses? 5. What actually happened. 6. Were the military action and Gaza "siege" legal. Netanyahu's commission of legal experts will only answer the last two questions (assuming they could accept the hearsay testimony of IDF investigators instead of the commandos themselves) which the "world" is most interested in (if they will accept a strictly Israeli commission), but will not be able to answer the first four, which have to do with the competence of the political level that decided on the military raid. Israel must find the answers to these questions if it wants such a clumsy operation not to be repeated, but this may hurt the politicians and they are trying to divert the public's attention. Incidentally, all the legal questions were probably raised already before the fact with the attorney general and he must have approved the "siege" and the operation from a legal point of view. Here, the political level is already protected by his opinion, so no problem for them with such a commission.
Israeli Air Force strikes two sites in Gaza in response to rocket fire (Haaretz)
from the article: Neither commission nor inquiry