This is the 'how dare you engage in self-defense' mantra writ large, applied when its one of the special empowered diversities is committing the crime against an individual, community or nation.

There are consequences to letting your country fall to a failed state with no law and order, that also plays a willing host to terrorists. If terrorists all over northern mexico were brutally capturing, torturing and killing US citizens while their political leadership laughs about it, you bet your bottom dollar that invading to kill the terrorists responsible ought be on the table if negotiations likely fail.