Racist remarks against your own people is worse, because not only does it perpetuate discrimination against a group by advancing a narrative about the group ("should we hire from this subgroup prone to x?"), it gives the bigots yet another vector ("even they themselves say it about their subgroup, so it must be true!")
We're on an international forum. Making "observations" like what the original commenter did can only decrease employment opportunities for an already geographically disadvantaged talent. Why do that?