When President Trump on 6 December 2017 declared unilaterally Jerusalem as the capital of Israel to where the US Embassy shall relocate, he violated UN Resolutions, international law, common sense and went against all diplomatic efforts to eventually bring peace to the region, not to speak about 130 countries that have already voiced opposition to such a decision. And this, before the Peace Process is coming to an end, at which point the 1993 Oslo Peace Accords would play out. They are also called the Road Map for Peace, between Palestine and Israel, which foresees a two-state solution and accordingly a mutual decision on Jerusalem becoming the capital city for both Palestine and Israel. These Oslo Peace Accords are still valid today.
But Mr. Trump may not have a clue that such a Peace Accord even exists. And his handlers obviously had no interest of telling him. – And even if they did, it would make no difference, because the exceptional nation has no scruples demolishing any agreements of the past, regardless whether or not it – the US of A – were party to the shaping of them. – See also the Iranian Nuclear Deal.