hardly, people can still come here on a student/work/tourist visa and then just not leave when it expires which happens a lot. who was it .... i think it was bachman that wanted to build another wall, a larger deeper one behind the existing one. like it would go 600 feet down and about two stories up and would be angled so it would be harder to scale. but what happens if u jump the first fence but can get over the second? ur some where between totally fucked and up shits creek.
as for mexicans being into asians i'm not mexican but my last BF was puerto rican and thai so i don't see why not.