I would love to say "needless to say", but unfortunately, there is a need.

Why Israel Needs a Fence by Benjamin Netanyahu

"First, Israel is not building the fence on territory that under international law can be properly called "Palestinian land." The fence is being built in disputed territories that Israel won in a defensive war in 1967 from a Jordanian occupation that was never recognized by the international community. Israel and the Palestinians both claim ownership of this land."

"Second, the fence is not a permanent political border but a temporary security barrier. A fence can always be moved. Recently, Israel removed 12 miles of the fence to ease Palestinian daily life."

"...saving lives is more important than preserving the quality of life. Quality of life is always amenable to improvement. Death is permanent."