oh my god why
this is such a massive waste of money
it's a solution that won't work to a problem that isn't really that major
if you want to prevent illegal immigration, make legal immigration easier
of course, Annoying Orange and his supporters won't do that because they don't actually want to stop undocumented immigrants, they want to stop people with darker skin from entering the country

tl;dr unless you're jesus or einstein, you pretty much can't enter the country legally unless you're lucky enough to have family
and even then, it can take
decades