To the original point, it's safe to say that highlighting a nationality with regards to trust is baseless and without merit, as would be for any other topic (men/women from x are y, z food is better here, etc..). Real life is much more complicated and nuanced past nationalities. Some might call it FUD (fear, uncertainty and doubt) but there's always a deeper rationale at the individual level as well.
It does seem like pretty low risk in this specific case so I agree OP's comment was bit over the top, but I would have no way to make anything resembling even an educated guess as to how far their programs go.