Trump has announced the USA will no longer defend Canada in the event of a ballistic missile attack, reneging on the NATO (North Atlantic Treaty Organisation) treaty. If Canada acquired nuclear missiles, these would trigger Kim Jung Un to think of Canada as an enemy. They are ineffective against leaders who, perhaps for religious reasons, have no fear of nuclear war, such as Donald Trump, Kim Jong Il, ISIS (Islamic State of Iraq and Syria), end times Christians… The slightest error using them could trigger a global thermonuclear war.
A system to shoot down incoming missiles does not have these problems. Unfortunately it is still experimental, and less than 0% successful.~ Roedy (1948-02-04 age:69)