Rob: The Mexicans opposed to the wall are the Mexicans who are too flaky to be granted a visa. 1000s of them cross the border every day, legally, to work in the US, shop, visit relatives, go to school, or play temporary tourist. Most of them have 10 year renewable visas. 60,000 vehicles cross into the US daily, through the San Ysidro border crossing....just one of several major border crossings along the US/Mexico border. Those Mexicans who now cross illegally, for the most part, are Mexicans, Mexico does not want.