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"Maybe the fall of this horrifying regime would serve as an example to all the other despotisms in the neighborhood" - Josef Joffe
This is one of the more despicable and frankly, racist rationalizations for going to war. When Libya forfeited its nuclear weapons program, this exact same rationalization was used, "see, invading Iraq caused a dictator to give up his wmd's"
But what this says is that it's okay to invade a sovereign nation, destroy its infrastructure and kill hundreds of thousands of its citizens because some other country poses a threat to you.
One can only accept this type of thinking if they fundamentally undervalue the lives of people other than themselves.