Asking for borders first means you are more interested in taking and giving than living beside and doing business with. It creates a new pretense for isolation and build-up of armaments. Its a way to make a hudna last longer until you can destroy Israel rather than enter into a genuine peace treaty. First you change you mind about things and one another, then you divy up the land. The later follows from the former. You can't expect the Israeli's to give up their death grip on the Palestinians until the threat of murder and destruction by Arabs is erased.
from the article: Palestinian negotiator: Netanyahu blocking path to direct peace talks