1.  Hussein used WMD's to kill about 13,000 Kurds due to an internal battle with them.  Our attack on Iraq has arguably killed 300,000 people.  So, because it was "chemical" weapons, 13,000 is a bigger issue than 300,000?  That's comical. It's just like the Syrian chemical attack.  30 got killed.  The world makes a big deal of it.   We do a bombing run that same week and kill 60.  Nobody here says anything, but they still make a big deal of the chemical attack.  Absolutely ridiculous P.R. garbage in our favor.  (oh, let's not forget that our attack destabilized the country where when Hussein was in charge it was relatively stable)

2.  GW Bush claimed Iraq was a threat to the United States.  It was widely publicized at the time as a means of selling the invasion.  Go read Bush's 48 hours speech.  So, yes, it was pimped as a threat.

3.  Hussein often lied about what he would do and was capable of.  Remember him talking about his Republican Guard?

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