And are they manned by people who are willing to use machine guns* on those attempting to cross, as nomadking stated would be required on the Calais wall?
btw, the Israeli wall was designed to prevent suicide bombers attacking Israelis - not sure if we have many examples of Mexican suicide bombers attacking US citizens in the USA...
Love how the argument moved from 'stopping illegal immigrants at Calais' to 'stopping Suicide bombers in Israel'as if the two things were the same...
I actually support building the wall at Calais, but I don't support the machine-gunning of anyone trying to breach it, just like I didn't support the East Germans machine-gunning anyone who tried to cross the Berlin Wall (in fact, I was there primarily to stop them imposing that type of behaviour on West Berlin residents...).
*citations needed of guards on the walls shooting crossers, preferably not the Trump rallying forum Breitbart...