Thanks for clarifying -- but the referent of the implicit "they" in that snippet (via "their droppings") was an (abstract) commenter -- not their country or nationality!

Which is also something you'd also prefer we not do (that is: referring to individuals with implied scorn) -- and since you're asking nicely and it's your shop here, I will make assiduous efforts to catch myself before doing so, moving forward.

So perhaps what I should have said was something like this:

   There's never a need to introduce (gratuitous) references to a commenter's nationality or other presumed essential traits... No matter how much we may object to the message or import of what they have written.

Which I would hope is a general policy we can all get behind on.