I'm going to go out on a limb here and say that it may be because zoning laws in that area state what you can and can't do in a residential area.
And while there is no evidence that the man had been uncooperative, why should I cooperate beyond a simple answer that what I am doing in my home is not unlawful?
again...going out on a limb...since the zoning laws say that religious assembly in a residential home requires a permit...and the permit wasn't obtained...couldn't that be considered an unlawful act?