Alright, but by the same logic we can say it to you. Hence it doesn't mean anything any more, does it? So please, just stop saying it.
Not really. Germany never tried to invade the US and it's, uh, far from clear that she would've. The whole European war wasn't really the US's problem in the first place (which is why I sometimes get irritated at the lack of gratitude - I mean really, the US didn't have to join the fighting at all!)
Hence it doesn't mean anything any more, does it?
You're right that it means less than some people try to make it sound. (I agreed with you that the US doesn't deserve "all" the credit.) But I still reckon it means something. The US deserves some credit, I would think, for joining a war not her own, against an enemy which didn't threaten her borders at all, to protect a bunch of foreigners on foreign land, sending thousands of young Americans to die in the process, for no other real reason than that it was the right thing to oppose an evil.
So please, just stop saying it.
No, I don't think I'll stop saying it.