Answer 1
It isn't, Muhammad made it quite clear the Jerusalem was for the Jews. The claims on Jerusalem by Islam were made later on based on myths.
Answer 2
Jerusalem is holy to the Christians because of the presence of the Church of the Holy Sepulchre, where Jesus is believed to be interred. Jerusalem is holy to Muslims because of the Mohammed's ascent to heaven from the Temple Mount. Please see the Related Questions below for more information.
Contrary to Answer 1, while the Qur'an makes it clear that Jews are entitled to the Land of Israel by Divine Mandate (Qur'an 5:20-21), it makes no comment on whether sites inside of the Land of Israel can be or are holy to Muslims.
Jerusalem. However, Jerusalem is a sacred city for also both Christians and Muslims.
Jerusalem
The city both want ed to control was Jerusalem.
Jerusalem
Jerusalem is the Holy City for Christians, Jews, and Muslims.
Jerusalem
Jews, Muslims, and Christians :)
Jerusalem
It is Jerusalem
Jerusalem.
Jerusalem
Jerusalem is considered holy by Muslims, Jews, and Christians.