The EU, France, the U.K., Germany, Russia and China all declared that the American administration had taken a wrong and provocative step that could damage peace efforts and trigger widespread violence.
Donald Trump's Jerusalem move made the situation in the Middle East even worse. Without east Jerusalem, there can be no two-state solution.
In its ending declaration, Trump's decision on Jerusalem was harshly condemned and a call was made for the U.S. to take a step back and if it didn't, it would be responsible for everything that will occur next. Another striking emphasis about the U.S. was the statements from OIC states that the U.S. should step away from its role in the peace process.
By calling for Muslim countries to recognize Jerusalem as the capital of Palestine President Erdoğan shows the expected leadership at the OIC summit in Istanbul
It seems that Trump has tried to exploit the regional chaos, state failures and divisive policies of some Muslim countries.