The reason that the barrier is outrageous is not that it's made out of concrete; it's because of its location. It criss-crosses into the West Bank [1].
[1] http://www.btselem.org/download/separation_barrier_map_eng.p...
[1] http://www.btselem.org/download/separation_barrier_map_eng.p...
You might also be interested in this talk, which if memory serves discusses the wall's impact on the community: https://www.youtube.com/watch?v=oSkevV-CoO4
[0]http://www.btselem.org/download/201411_btselem_map_of_wb_eng...