Israel needs those weapons for a far more important use than Iran, at the moment. Hezbollah has rearmed in Southern Lebanon. And if hostilities were to break out, Israel would need those bunker busters to maintain the survival of their nation.
Obama damn well knows this, and having Biden instigate instability in the region, while Obama denies Israel a defensive weapons system, is nothing if not a designed effort to harm Israel in the extreme.
A self fulfilling prophecy....