Using that logic, we should have stayed out of WWI and WWII, they weren’t our wars.
The Soviets invaded Poland in 1939 with the Nazis, they were the enemy. Then they were losing, that is why they suddenly became “allies”, but they were never our allies. They are still not our allies.
There were many French on the sides of the Nazis as well. Does that mean that it nullifies any help. Again, your logic falls down.
Secondly, we had hundreds of thousands of troops on the Eastern border for decades, so it will cost the US one way or the other. We paid, we always paid.
If you think it would have been cool to ally with nazis in 1945, I doubt I can change your mind. And having troops on the border a few decades cost money, but not a few hundred thousand lives.
I will never understand why some people see the Germans circa 1945 as someone an American should embrace in common cause.
Honestly, tactically Patton was a true genius. Otherwise, Patton had several serious screws loose. This was one of them.