Lift the "blockade", let Iran ship in some serious surface-to-surface missiles, have Hamas range all of Israel with them, and wreak some serious death and destruction. Would that change the minds of BDS types a little? Do you doubt that's what would happen if Israel didn't fight back against Hamas' death mission towards the Jews?
Much of humanity longs to massacre Jews, and much of the rest of humanity is content to sit and watch it happen, be it with a shrug, a smirk or a fistpump. So of course the Jews need a state in which and with which to defend themselves. When we talk as if their present state is a mistake—a rectifiable mistake—then that is just shark chum in the water for would-be pogromists.
Or you can listen to Pat Condell explain it, much more tartly than I could: