There were many reasons for invading Iraq.
Its been re-hashed so many times that at this point, which one of those reasons gets sited only shows the political pursuasion of the person arguing that the invasion was or was not justified. I won't get into any more pissiong contests on that one...Just not worth it... Its time to look toward the future and I'm no historian so I'll leave it to the historians to judge what we have witnessed up until now...Bt the issues you raised concerning Iran and Syria are legitimate.
Syria and Iran have some serious choices to make, as do we.
Scott