But they can by a property owner and an American, it was citizens arrest. The man has a right to defend his property. Constitutional rights always trump civil rights. IN fact without a constitution, no one would have any rights. This whole case is an attack on US sovereignty, and the judge should have thrown it out. The illegals should be happy they were not shot for trespassing.
To be more clear, only the government can deny a person civil rights.
The citizenship status of the illegal aliens has no impact on the case as they are protected by the Constitution.
Next time, the ranchers will know better. And a quiet burial can be had under the manure heap.