Except I don't have a warehouse in the United States. All I have is widgets located in Europe, I put them in a box and I ship them using parcel post to anyone a

Except I don't have a warehouse in the United States. All I have is widgets located in Europe, I put them in a box and I ship them using parcel post to anyone anywhere in the world. Yet you are saying that I am now beholden to US law because I interacted with a customer located in the United States ...