The decision by President Trump to recognize Jerusalem as the capital of Israel was sure to make waves across the international community. This article from the Washington Post shows how already there are significant threats to peace.
The question is, why now? There are obviously already major tensions between many many Middle Eastern countries and the United States, not to mention the danger of terrorism, so why stoke the fire? To me, it seems a lot like a power move, and we are going to see very soon how the rest of the world responds to that type of action. Our new administration will learn that believe it or not, there are consequences and the US cannot simply do whatever it wants in international affairs.