Israel 's construction of the barrier began in 2002 .
Israel 's construction of the barrier isolates Qalqilya from the north , west , south , and half of its eastern side , leaving a corridor in the east connecting it with smaller Palestinian villages and hamlets .
Israel 's construction of the barrier began in 2002 and isolates Qalqilya from the north , west , south , and half of its eastern side , leaving a corridor in the east connecting it with smaller Palestinian villages and hamlets .