Of course, as Switzerland did during WW2, Israel today has the full right to protect her borders. The difference is, that Israel currently has no internationally recognized borders. Now from Israel critics to Israel friends all over the world, there is an overwhelming agreement, that Israels permanent borders should be some- where around the 67 line in exchange for a "warm peace" with the Arabs. No sane person will then dispute Israels right to defend that border. P.S. Judging from your name, at least you don't seem to intend to settle down in the West Bank over the next couple of months...:)
from the article: Can there be such a thing as an Israeli hero?