The allied victory was not a sole American effort. And the US would have had a hard time if the Germans were to take over Europe. It was in its own interests to get involved.
See, taking objective criticism as an insult and reacting strongly with a false sense of pride ("if it weren't for us in the WWII!!!"). Dealing with american here, no doubt about that.
"Dealing with american here, no doubt about that" = nationalism. I downvoted both of you, but not your first post, which I agreed with. My point was that I am also an American, yet capable of agreeing with you.
Sorry if that looks like nationalist to you, but it obviously doesn't look that way to whoever downvoted you. I'm definitely not pretending I know everything about americans or that you're all the same or that we can't agree on anything.
But bringing up scars of war is definitely not something we europeans like to engage in. Especially not as a response to criticism.
Be thankful for being able to insult us Americans in English, because if it wasn't for us, you'd probably be doing it in German.
</stock response to any illogical European insult of the U.S.>