What is this bullshit about a wall at the mexico border being an unrealistic idea? (It would be mostly be a fence, btw, as the israeli "wall" is too.) The length of the US mexican border is 2000km the length of the israeli wall will be 760km when finished. Let's compare some ratios:
US border vs Israeli border length: 2000/760=2.63
US GDP vs Israeli GDP (billions): 14k/200=72.68
US population vs Israeli population: 309/7.28=42.4
US defense spending vs Israeli defense spending (billions): 500/10=49.15
The argument that the projects impossible is the kind of pernicious quasi rational crap the MSN feeds people. The iranians are building a 800km long wall. (To keep out drug smugglers, terrorists and illegal immigrants from pakistan.)
It's a ludicrous argument, yet I've constantly heard it. The communists are literally terrified of a wall being built, as it would completely destroy their plans.