They object to "a fence".
a fence...
These political OLIGARCHIES of south america are worried they will have people suddenly turn on them instead of fleeing to the USA. They are just doing what castro did with the mariel boat lift only slower.
Slower? I don't have the figures for the boat lift so you may be right about the speed factor. Immigration officials estimate 3 MILLION illegals enter this country every year and they are only able to apprehend 1/3 or about 1 million of the illegals entering. Might be a slower method, but the numbers are scary to say the least.