Six strangers with guns coming to your home and demanding to conduct a search is hardly a friendly visit. And however cordial they are, they have the right to use any violence against you - including lethal - at any moment they decide there's anything suspicious, and the experience suggests even if they are completely wrong worst thing that would happen to them is suspension with pay. As for you, anything you say to them can and will be used against you, and any factually incorrect statements, however trivial and minute the incorrect part is, that you make to them can be grounds to a felony prosecution if they so desire.

So I don't think it can be dismissed as a friendly encounter. I would certainly feel extremely discomforted by such a visit.