Abbas says he would turn down free land if it wasn't claimed by Israel

'... we in Palestine also would 'never establish a Palestinian state on one centimeter of the territory of another Arab country.'

The Palestinian claim is not for land but for land they can take away from Israel. Piece by piece until Israel is too small to be viable or to protect itself. 

More here http://elderofziyon.blogspot.co.il/2015/01/abbas-says-he-would-turn-down-free-land.html