In many parts of the US we create paths for unwanted animals to cross freeways safely. Most are tunnels under, but sometimes it’s a crosswalk over. The idea is that no matter what we do, the animals are going to find a way to cross. We create the paths(at significant expense)so as to avoid unwanted death of the animal, and also to prevent people from hitting them at speed, causing additional injury, death, or at minimum financial burden.
I feel we should either treat these people like humans and help them (legalize their immigration), or treat them like animals and do at least a little bit to prevent them from causing further harm and financial burden. Treating them like terrorists seems to be the worst option.