They have said many many times, from Arafat onwards, that their ultimate aim is the total destruction of Israel. They're still teaching their kids that the whole of Israel is Palestine. So why would anyone believe that the Palestinians want a just peace, when what they want is an "ISRAEL FREE WORLD"? And certainly a state where any Jew is not welcome. As you say, consistency convinces.
Israeli moderately wounded in stabbing attack near West Bank settlement (Haaretz)
from the article: With a victory like this...