Lol. Communism may fail, but it doesn't always fail right away. How others react to it definitely makes a difference. Furthermore, it can adapt to become less communist but still really bad and thrive for many years. (See China.) I do like how you don't deny that you'd have let Western Europe get taken over - only that they wouldn't be communist today, which is laughably speculative. To hell with the Brits, French, Belgians, Dutch, Danes, Norwegians, Spaniards, Germans, Portuguese, and Italians. **** 'em. Let them die.
And of course, all of this presumes that you crackpots would have entered WWII in the first place. I definitely don't see any reason why you would intervene in Europe. Everything you say about the Middle East was true about Europe at the time. That means the German invasion of the Soviet Union would likely have succeeded, so instead of being under communist rule, the people in those countries would live in occupied territories of a Greater Greater German Reich. Maybe some of them would have been better off, but it sure would suck to be Jewish.
There's an argument that you might have gone after Japan, but you wouldn't have had a US presence in Hawaii or the Philippines, so there would be no Pearl Harbor to attack. You would have waited for Japan to attack the West Coast. But then again, why would that be a problem? You surely wouldn't have annexed Texas, so there wouldn't have been a Mexican-American War. That means the West Coast would have been Mexican territory. Damn, if only we had listened to you guys, we could have pawned off the burden of fighting the Japanese onto the Mexicans. We could have just cowered on the East bank of the Mississippi River and hoped and prayed the Japanese never got that far.