If US leaves Iraq too soon, Iran and Syria will rush in!

Some US politicians are trying make Iraq the Vietnam war again by saying the US should immediatley get out of Iraq.
If it does so now or anytime before the Iraqis are ready and able to govern themselves, you can expect Syria and Iran to rush in. Why? They will because they and their ideologies are the great destablizers in the Middle East. Syria's ideology? Who knows, it's just anit-Israel and anti anyone who opposes it. I suspect its rulers have the view that what Saddam Hussein did not do--conquer the Middle East, they can do. There also is the matter of all that oil in Iraq, too, of course.
Iran will rush in for religious reasons, too, but the oil will be a big factor in its interests, that and wiping Israel off the face of the earth.
There will be other fractions in Iraq that will also try to assume control of Iraq if the US leaves too early. From one of those a new Saddam could rise up, probably backed by Syria or Iran.
And, you can expect that if any of those groups succeed, the blood Iraqis have shed so far is nothing to what they will shed then.
The only hope for Iraq is for the Iraqis, all the Iraqis, to get behind whatever government they elect to make Iraq once again the star of the cradle of civilization.
But, US politicans and Iraqis must recognize the only way they can succeed is with US help because only the US can provide the stability Iraq needs to build itself. How do we know that? The US helped Germany get on its feet after World War II, and it was only continued US presence in Germany that prevented it from becoming a Soviet sattelite country as so many other European countries did.
The US aided the Japanese after World War II, and while the Jaspanese certainly did much to re-build their economy and become a world economic power, the US support and presence helped.
The same can be said of Korea, and it could have been said about Vietnam if American politicans had not ducked out.
So, Iraqis and, in fact, everyone in the Middle East should hope and pray that Iraq does succeed and the US does stay to help it. If the US doesn't stay, probably for years, no one will win, not the Iraqis, not the US, not the Middle East and not the world.