“Did you see how easily those caravan illegals were jumping the walls that are quite similar to Trump’s prototypes?”
Two or three guys can boost another over an eighteen foot bollard barrier, but I have not seen any take on thirty foot bollards. You could use a tree/pole climbing harness, but it is not for the faint of heart.
Start on top of a truck and you’ve shrunk 30 feet to about 20-22.