Some good history to research about Jersualem and why everyone is staking claim to it is, the history of the Temple Mount. The Temple Mount was like the Kaaba of the Hebrew people it was destroyed in the war by the Muslims and The Dome of the Rock was built on top of it. The Wall that the Jews pray at today is the remains of their old temple right next to the Dome of the Rock.
Mecca is suppose to be the Holy city of Islam
and Jersualem was always the Holy city of the Hebrew people & Christians long before Muhammad was even born.
Ancient artifacts and historical evidence points towards this. However Muslims claim on it has nothing to do with artifacts or history but simply because apparently
1. They conquered the city
2. Suddenly decided (even disputed) that Muhammad flew on a winged horse lady to heaven, coincidentally right over where the Jew's Temple was built.
Then when Israel came into being again in modern times the Jewish people were like, ok guys we're taking it back now. But not really because they didn't want to cause a huge unrest so the Dome of the Rock is managed by Muslims only according to the government and non-Muslims are not allowed. However there are excavations under the Dome of the Rock, kind of secretly but not, because the Jews are trying to access old artifacts that might be buried under the Dome of the Rock from their Old Temple.
Religious property is tricky because people can make up whatever the hell they want and as long as they have enough followers suddenly it is true, regardless of the lack of evidence. such as the Dome of the Rock.
The Temple Mount was HUGE, and you can see how the Dome of the Rock pretty much dwarfs the original building and just kinda stuck it in the middle. Quite fascinating but such is history, things get conquered destroyed and replaced.


But I bring this up as overwhelming physical evidence that some other religion was there LONG before the Dome of the Rock was built.
http://en.wikipedia.org/wiki/Temple_Mount