We went into Iraq 20 years after Saddam had used chemical weapons. DUH<quoted text>
We went into Iraq under similar circumstances - biochemical weapons had been used on innocents and for humanitarian reasons.
But if Iraq and Iran had been killing each other off, more than likely we wouldn't have interfered then and waited for the outcome - even if many innocents sadly would have been caught in the middle of these two enemies fighting each other.
It happened when Reagan was President, and Reagan chose to do nothing about it.
Bush picked it up nearly 20 years later and tried to use it as an excuse, after his other rationales were proven wrong.
Look it up, nitwit. You've got your head firmly stuffed up your ass again.