There are millions of tons of our best machinery and equipment laying at the bottom of the ocean thanks to Hitler's submarine corps. A lot of good stuff has been posted about the war and our involvement. We fought a war on two fronts plus furnished the machinery and supplies for the European front and Russia. FDR like many other Americans admired Hitler at first. his prosecution of the war was perhaps the only decent thing he ever did for America. He let his generals handle it. They were pitiful enough. Bradley, Omar and many others were country Club Commanders as was Ike. They hated Patton because he was richer, and more aggressive. He ignored bad orders and would not Monty get the credit he thought he deserved. The German Command to the man respected Patton with good reason.
The Russians everybody loves to hate were the Stalinist's and they were brutal. The Russian people suffered greatly at their hands. Russia today is not the same as it was under Stalin. It might not be the Republic we'd like it to be but then neither are we anymore. if you hate Stalin you must hate the democrat Marxists because they are just as evil and will turn out just as brutal if we give them the opportunity.