US prepares to use toxic gases in Iraq

Okay, so let me get this straight...we need to invade Iraq because they possess "weapons of mass destruction" such as chemical agents that can be used to cause harm to the US populace and others around the world, but in the process of invading Iraq we are willing to use chemical agents to cause harm to their people...all so that they can't do the same to us.

I read Catch-22 before and I can't help but be suffering from a big-ass case of deja vu right now...