They watch the evening news, see a big wall on TV, hear Trump talk about extending the wall, assume it's the same wall all across the USA, and then continue on with their life like normal humans.
http://tomohalloran.com/wp-content/uploads/2014/03/wall-noga...
compare that to the photo of the barbed wire fence along the border in the other comment.
I'm genuinely surprised by your experience. Maybe I was simply lucky enough to only talk about border issues with more educated than average people. I guess it's because I was in college when I lived there, and mostly hung out with Latino college students.
I agree on law and order, but again, isn't it a little crazy that in one state you have one set of laws and then once you cross an imaginary line you get an entirely new set of laws?
Yes, that's the point. For a country whose first words were "all men are created equal" we've built up a mindboggling apparatus for demonstrating that that's not true.
We drove past a border patrol depot, and there were literally hundreds of vehicles. "Wow, the border patrol must have a huge number of staff to keep most of those active at once" > "No, those are just for the TV cameras - border patrol doesn't have anywhere near that number of staff"
Other oddities that stuck out for me in the area were that the border ingress to Mexico was literally just a turnstile, and that the distance markers about 20km short of the border on the US side were, indeed, in km instead of miles.
What do you think is incoherent? A plan to build some kind of physical wall (barrier), or a serious plan to keep people from crossing the border outside of the normal immigration process, or both?
On the other hand, given the trade deficit he could say, we're pulling out of Nafta, unless you kerb your unauthorized border crossings.
Alternatively he could fine the unauthorized border crossers they catch and partially fund it that way. Or he could institute temporary permits (seasonal whatever) and impose a fee for those. Also fine employers who hire undocumented workers and fund it partially that way.
It really depends on what he means by "Mexico" and "pay". But if he's flexible, and he appears to be, it could be possible.
Trump doesn't help his case by simply headlining "and Mexico will pay for it" over and over, but he does mention practical suggestions (even if you remain opposed to the fundamental concept) from time to time on most of his policies.
However, it's a perfectly coherent idea: it has a concrete meaning that is easy to understand.
Whether it is realistic, plausable, beneficial, cost effective, or just plain stupid is another question.