Jerusalem is 3000 years old. It was divided for 19 years.

So why exactly is that anomalous 19 years considered the "status quo" again?

And why are the succeeding 44 years of a  re-unified Jerusalem considered something that is somehow an obstacle to peace?

It isn't because of its legal status. It isn't because the world loves Palestinian Arabs. It isn't because the world accepted Jordan's annexation of half the city. It certainly isn't from any displays of love of the city shown by the Muslim world during those 19 years.

There is only one possible explanation: too many people do not like the idea of Jews controlling their own holiest city.

That is the issue of Jerusalem in a nutshell. And it just so happens to be the issue of Israel in a nutshell as well.