This defensive tactic can be a deadly mistake. Lets say the enemy, Ira...sorry, "Ireland" has nukes and is determined to use them. Ireland would build multitudes of cheap, inaccurate missile and lob them over, finishing the stock of defemsive Interceptors. Once these are depleted, only then Ireland sends the (better) missile with the nuclear warhead.

To thwart this, threr is no alternative for the defender, who must go on the offensive as soon as possible and destroy Ireland's launch capability, or it's nuclear weapons program.