Never mind singing, first legalize the ban on audible noise and ritual objects to the site...even muttering a prayer by Jews is now subject to expulsion by Israeli police. Is the Temple Mount even mentioned in the Koran ? The entire premise is completely untenable.
Islam conquered the Mount and lost it. Too bad. Why is the UN and the world enslaved to Islam? Is this the religion of the Anti-Christ?
Before even that: find out why the ban on Jewish prayer is maintained no matter which party is in power. Is there an Israeli political party which vows to allow Jewish prayer on the Temple Mount?