Demanding borders without security, or even the PA showing they can build a Friendly neighbor State(Gaza is a state of it's own and an enemy to Israel) There is no unity. There is no clear government medical or welfare programs in the PA, only foreign aid and the UN doing all the responsible work, even with billions over decades donated. The fact that Hamas is hostile enemy is also a big factor. It seems to me that the PA prefers as is than deal with reality.
Palestinian man suffers light wounds from rocks thrown by Jewish men in Jerusalem (Haaretz)
from the article: Palestinians: Peace negotiations with Israel have ended