A sizeable portion of the UN is blatantly anti-Semitic. As far as I am concerned, that organization needs to be disbanded altogether.
You may be right that Netanyahu feels unconstrained, which is a good thing imo, but Israel is completely surrounded by her enemies, who would like to see Israel destroyed. Although they are militarily excellent and unafraid, I'm not sure how they can take on an all-out assault on that many fronts. It's not that I expect that, but I have no faith in the reasonableness of many leaders in the ME in the event that things get heated up.