Before 1967, there were clear areas south of the Golan Heights which were not to be settled. These were zones which Israel diverted water to in order to increase settlements. These were zones in which Syria dropped artillery, in order to decrease settlements. War and killing are bad things. But you don't start reading a book from the middle. And you can't judge an instigator by responding to the last action. The reason that Moshe Dayan chose to take the Golan Heights was because he could. Because he heard the Syrians were not positioned for a hard fight, and it would be possible to defeat them. It had nothing to do with shellings or artillery or morality or anything else. It was the simple Israeli rule of force. Can we take it and hold it? Yes? Then do it. Leave it to the politicians later to explain why it was necessary.
Law expanding definition of terrorist activity passes first Knesset reading (Haaretz)
from the article: Was it a war of choice?