The core issues cut both ways and both parties are afraid to touch them. To think that Abbas is any more willing to accept compromise on core issues thatn is Israel is laughable. Abbas will never relenquish for all eternity any claims on Israel proper and in particular to give up the right of return for Palestinians to Israel proper. And if he did, Hamas would wage open warfare in the streets of the west bank as well as Gaza. Likewise, Olmert's coalition cannot survive core issue compromise. But dont make the mistake of suggesting that it is ISrael that stands in the way. Remember, it was Arafat that couldnt compromise on core issues last time around.
ISIS kills 22 in Yemen's Sanaa, Aden; targets both gov't and Houthi rebels (Reuters)
from the article: You can learn it in a negotiations course