Government borders are categorically different from private borders. When you and I separately define the borders of our individual properties, we define them for ourselves only. You and I may allow or exclude whomever we please. We may make different choices for ourselves, but may not impose those choices on each other.
National immigration controls take that choice away from us. They collectivize not only the external border, but every private border within; they deprive every property holder of autonomy. They also threaten to physically break down our private borders, and to shoot our pets, children, and ourselves, if anyone so much as alleges that immigration controls have been violated.
If you wish to compare a front door to a national border, the proper comparison is this: do you want your front door to be broken down by ICE agents whenever a vengeful neighbor makes a phone call? Because that is the natural consequence of immigration controls.