Now Lebanon, Syria, Palastine with Hamas are all out of control since we invaded Iraq, did U.S. make mistake?

Not to mention Iran also. Now it seems like the whole Middle East is coming apart since we ousted Saddam from power. Wasn't it more peaceful when Saddam was in control? Isn't it obvious that Saddam had the fanatics and all other middle east on tippy toe, including Iran? And for those who complained that Saddam gased his own people is justified for us to kill over 600,000 more Iraqies from Bushe's war and not to mention over 5000 U.S. troops and Allied soldiers? Was this war a mistake or a HUGE mistake?