Here's a thought, if the government doesn't have the ability or the will to stop them from coming across perhaps they also don't have the ability or the will to stop 10,000 armed Americans from defending the border ourselves. I bet you a single volley straight into the air at once turns everyone around. Obviously don't do this, they'll put you in prison for sedition or some other absurd charge.
Here's a thought, if the government doesn't have the ability or the will to stop them from coming across perhaps they also don't have the ability or the will to stop 10,000 armed Americans from defending the border ourselves. I bet you a single volley straight into the air at once turns everyone around.
Barbed wire, machine gun nests, and mine fields would stop this easily.