An Israeli style fence fence fence will work great along most of the Texas-Mexico border. Yes we realize you Texas dudes are real special with a river constituting 95% of that border. But a fence (not a wall) is feasible along most of that Tex-Mex border and will stop just about all Mexican trespassers. Of course all fences have to be backed up by armed response by the Border Patrol and National Guard
Same as Obama's worthless arse is protected not just by a high wrought iron fence around the White House but by the Secret Service
Great visual aids