OK.
Let's assume Hitler conquered USSR in 1941. He came very close, you know. Then he spends three or four years building up his navy and air force using all the resources of Europe. Following which he crushes Britain.
He spends another five years building his fleet, then attacks the US in conjunction with the Japanese, who have meanwhile conquered everything from India to Australia.
The Nazis ally themselves with various Latin America dictators to acquire bases and support. It isn't much of a jump from Peronism to Nazism.
With such a scenario the Nazis could have realistically invaded and taken the US by perhaps 1955, by which time it would have been the US and Canada against the rest of the world. It would have been a heck of a fight, but we would have lost. Unless we had politicians come to power who "made peace" at the cost of the US becoming essentially fascist itself.
Obviously this is only one of many scenarios. Most critically it leaves the Bomb out of the equation. However, I will bet you anything you like that I can come up with a more realistic scenario by which the Germans invaded and conquered the US as part of an extended WWII than you can come up with one by which the jihadis invade and conquer us.
It is quite important to remember that Arabs, as such, haven't been a conquering people since about 800. Muslim medieval and later conquests were almost invariably made by Turks, Berbers, Kurds, Afghans, etc. rather than by ethnic Arabs.
No, he didn't. In order to "conquer" the Soviet Union it would have been necessary for Germany to invade and occupy a region that covers 11 time zones from west to east and is filled with multiple racial and ethnic groups that couldn't even be controlled by a totalitarian Soviet government with nuclear arms at its disposal. The Germans would have spent the better part of 50 years just coping with the disaster they brought upon themselves by "winning" that war.
With such a scenario the Nazis could have realistically invaded and taken the US by perhaps 1955, by which time it would have been the US and Canada against the rest of the world.
Take a look at a map of North America, and then imagine what it would have been like 50 years ago when the population was less than half of what it is now. This place would have been basically ungovernable back then -- especially when you consider that even to this day in our candy-@ssed, feminized culture there are still about twice as many firearms in the U.S. as there are people.
However, I will bet you anything you like that I can come up with a more realistic scenario by which the Germans invaded and conquered the US as part of an extended WWII than you can come up with one by which the jihadis invade and conquer us.
You're right. The notion that "jihadis" could invade and conquer the U.S. is delusional. That doesn't make your "extended World War II" scenario with Germany any more realistic.