Polish-Americans are certainly obsessed with ethnic purity
Wrong, that is a delusion of yours, delphiandomine, it is not a statement of fact.
How often do we see them on here, boasting about how big the brains are and how much luck they have with women, and so on.
This is an improperly punctuated question, but I do so wonder how often "we" have seen Polish-Americans do this on the forum. You should provide some examples, because I can't think of any.
In fact, haven't you used it yourself in that way?
No, I haven't, but please feel free to peruse my posts and try to contradict me. It would do you good to read the writing of someone who uses logic.