All the people, countries that already hate Israel will of course say Israel is wrong. I mean come on they are hardly going to say lets wait until we have heard the full story. Even if Israel was 100% correct and had all right information and could prove they did it for x reason they will still be condemded by those people and countries.
While I think it could have been handled differently I dont think I have heard the main reason behind why they did it (other then guessing the reason). I mean it could have been any number of reasons. The information they could have acted on could have been majorly wrong or right lets see what has or hasnt been found.
I cant remember who said it but honestly why would an aid worker attack an armed solider I think thats crazy really. I mean if you were boarded by what you think is an army I think the sensible thing would be to settle down and leave them to it. But then again if the Israeli's went in heavy handed I dont blame people reacting that way. Once again hard to say without knowing why!
All I will say is its really hard to judge as all partys are trying to warp, smear and tell a different story. At the present no one is right or wrong but as other have said it could have been dealt with differently. Just wait for the investigation to say who was right or wrong and what the finds or overall outcome was.