I was against the war in Iraq and still am, but IMO the jury is still out whether the war in Iraq made the world less safe. Saddam was a brutal dictator including gassing and genociding the Kurds. The Kurds now have a fairly stable government in Northern Iraq thanks to the invasion and are a center of prosperity in the region. ISIS has been largely suppressed, and there's been no repeat of the Iran or Kuwait wars of Iraq since the US takoever.
The aftermath of the Iraq invasion led to the deaths of hundreds of thousands of civilians. It doesn't seem unlikely that Saddam would have killed fewer than that.
