The US-Mexican border is "just a tad" longer than the sum of the various Israeli borders. Without strong laws and ACTIONS to discourage the things that encourage aliens to come here illegally, a fence will prove 1) expensive and 2) useless.
Key among these is strong enforcement actions on businesses who hire them (knowlingly OR unknowingly). The owners of said businesses should face stiff fines AND prison time.
Oh come now. What's a couple of billion? That's how much a border fence would cost. $2 billion ain't nothing. A water droplet in the Pacific.
And it would not be "useless." A strong border fence with round-the-clock surveillance would decrease illegal immigration by over 90%.
Key among these is strong enforcement actions on businesses who hire them (knowlingly OR unknowingly). The owners of said businesses should face stiff fines AND prison time.
You have to look at the root of the problem. Why are businesses paying illegals under the table? Blame the tax code. Blame the suffocating cost of doing business in America. Running a business is a nightmare now. Although I disagree with what these businesses are doing, I empathize with their predicament.