Why is this so surprising? the Obama administration practically shut down all construction in Jerusalem for years, but cities grow as population grows, and  Jerusalem has always been the capital of Jewish people and not any other nation.

Jerusalem was not mentioned once in Qu'rahn. Jerusalem was never the capital of any Islamic political entity or even an important provincial capital during all its Islamic occupation. The name of Jerusalem in Islamic sources indicates that the city did not belong to the nation of Islam. Religious and other learning Muslim institutions were not established there. Jerusalem was almost always neglected and in oblivion under Islamic rule. 

 Jerusalem has always been a real or symbolic capital for the Jews., Under Jordanian control Jews could not even visit, under Israeli control Christians, Jews and Muslims live and pray in security.