I share your sentiment. Unless border state governors deploy their own National Guard under Title 35 of the US Code, there is nothing ordinary citizens can do against the behemoth.
The Guard will hand them over to ICE who then hands them over to DHS for a tax-payer funded flight somewhere further into the US.
Instructions on how to innocently approach Guardsmen are probably being distributed (en espanol) to would-be crossers South of the Non-Border.