So any crowded country can steal adjacent land from a neighbouring country if it's not being used?

Now what adjacent country would you be taking about in Jerusalem mousethief? The bit that Jordan illegally "annexed" in 1948 which Israel took back in 1967, i.e. the bit that has always belonged to the Palestine defined in 1923 by the British with the authorisation and approval of the League of Nations, and which NEVER belonged to Jordan?

Lox is there such a country as Palestine? The answer to that question is: "No there is not"

Gaza used to be in British Mandated Palestine it was therefore open to settlement by anybody only Trans-Jordan was reserved solely for Arab occupation. In 1948 Egypt illegally invaded annexed and occupied Gaza. In 1967 the Israelis drove them out and returned Gaza to what formerly used to be known as Palestine. On 1st September 2005 the Israeli unilaterally gave up Gaza to the Palestinians.

The West Bank and East Jerusalem used to be in British Mandated Palestine and as such open to settlement by anybody. In 1948 Jordanillegally invaded, annexed and occupied the West Bank of the Jordan and part of Jerusalem which up until that point had been a undivided city. In 1967 Israeli forces drove the Jordanians out. The Jordanians maintained their claim on the terrirtory, a claim that was never recognised by any international body until 1988. With the exception of East Jerusalem and the former Israeli - Jordanian no man's land, the West Bank was not annexed by Israel.

The Israeli's have every right to build in Jerusalem.