Israeli land grab?

When israel built its wall, it insisted that it was purely for defence, and yet it was often built on plestinian land often built in such a way as to split small towns in half and built over atleast one olive tree orchard owned by a palistinian family for over a hundred years, and still they said it is no land grab, and yet the new goverment is now saying that they are going to set israels final borders along the lines of the wall which brings me to my next point, the voting in of hamas is good for israel because it allows them to justify to the international community not having any negotiations with the palistinians on this issue above all others [the final borders of israel and therefor the final borders allso of palistine] if for instance tommorow hammas were to say that they officialy renounce terrorrism and recognise the state of israel then the israelis would have a real problem on their hands.