It is really complicated..Palestine is probably the most prominent indicator of how unjust the world is being lead by politics and power. To your point, I would say it is due to the evolution of the political scene and the behaviour of the Zionist regime which pushed it into isolation to the point where they could not get adequate votes among UN member states. Additionally, west is a bit tired of supporting the Zionist's states and cleaning up its miss so they want to have some stability..The west was a key player in creating the Zionist state but they did not have the same intention Zionist's had..My thought anyway..interesting topic :)