Israel was ready to do all of the 4 items that you mentioned during the Ckinton Administration at Camp David. Arafat refused it. Recently Israel puled out of Gaza showing one more time that it is committed to a two state solution living in peace. However the homicide bombings are still going on the Kassms are still falling on Sderot. The onus is on the PA now to stop the terrorism, to stop the homicide killings to un arm the Hamas etc. Palestinians never miss the opportunity to miss an opportunity as Abba Eban said.
from the article: Ahmadinejad can continue to smile while the world argues