Duh! THE ARABS!
Any place that allows thousands of people to congregate has metal detectors: concert venues, shopping malls, airports, public buildings, etc. The Mount is no exception. By their actions the Arabs have proven that they can neither be civil nor trusted. They should be thanking their lucky stars that airport x-ray machines weren't brought in.
I find it funny, in a very pathetic sort of way, that the Muslim 'leaders' are calling for 'rage' about the new security measures- even though it was their own who killed the policemen!
I'm not a politician, but common decency and security demanded that the Mount be closed, and I would have closed it for a month. There are plenty of other mosques these 'observant' Arabs can attend.
But now precedent has been set. Every time an Israeli is murdered by a terrorist, the Mount must be closed. And every time it is closed, it must be for a longer period of time.
If the Arabs don't see the inside of the mosque for a year, it will only be because Israelis were killed.