If someone wants a wall along their property line, and their property line happens to coincide with a government "border", I'm fine with there being a wall along that segment of the "border". Even if the adjacent property owner doesn't like the wall.
As long as they fund it themselves, or with voluntary contributions, and don't try to extend it beyond their own property lines.
In that case-- and ONLY in that case-- a border wall is not a property violation. But I've seen no one among the Wallists advocate for this kind of border wall.
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Reminder: I could really use some help, but I'm not building a wall. Yet.
