miritchka, it’s not that simple.
1. We were not punished for what the gentiles did. But I’m not sure (I don’t know) we “did everything we could” either.
2. The gemara clearly states that the only zechus the Gentiles have is that they don’t write a kesuba bein ish liIsh. Absent that…?
3. There is a concept of Oy LaRasha Oy Lishcheino, which means that if an innocent person associates with a wicked one then the innocent person may end up caught up, CH”V, in the punishment of that wicked person.