How many Jews does it take to change a light bulb? It depends.
How many Israelis does it take to put up a fence between Israel and Palestine? It depends on your definition of ‘fence’.
Needless to say, this is not the fence that I think is in the best interests of Israelis to put up. My fence would follow pre-1967 borders and involve the removal of Israeli settlers. The ‘security fence’ being built roughly follows those borders, but cuts off from Palestine Palestinian towns that straddle the ‘green line’. This fence will also separate a few Israeli farmers from their fields, but more importantly, put a good number of settlers on the “wrong” side of a proto-border, for want of a better term. Temperary security fences have a habit of sticking around for a long time.