Before the 6 Day War, there was a no man's land running through Jerusalem dividing it between Jordan and Israel. Why return to that? Why should Israel divide it's capital? Jordan conquered half of Jerusalem in 1948. It was no more theirs than anyone else. At least the plan was for J'lem to be either international or since it was predominantly Jewish, a part of Israel. What was lost in one war was gained back in another. The same applies for parts of the West Bank. If you support a Palestinian State (besides Jordan which already IS a Palestinian state) then you must realize that demands that undermine the Jewish Identity (of which J'lem plays a major part) will not be acceptable and you must compromise.
Pakistan: Suicide bomber attacks tribal police, killing 4 (Reuters)
from the article: Olmert's negotiator: Full Mideast peace impossible