If your anecdotal evidence suggests many Hispanics actually support harder line immigration on Hispanics -- that tracks, too. There are folks of all stripes who believe themselves to be the hard working beneficiaries of the American dream, and see newcomers as latecomers, cheaters, and perhaps threats to their livelihood. There are also people of all stripes who admit the current system is wildly over-stressed and in need of better controls. Your friend from Venezuela may look at Mexican immigrants in a very different light than fellow South Americans. In my community, first wave Mexican immigrants don't necessarily sympathize with the recent arrivals from Guatemala. And let's not forget 1930s California, where new arrivals from the white dustbowl midwest were shunned and exploited and by the white midwesterners who happened to get there first.
My guess is that a lot of Hispanic immigrants who did things the right way in previous generations were not escaping the political and cartel violence that has created the recent immigration waves. It's a mess. Haven't heard anyone with a simple executable solution.
Donald Trump has certainly presented one, but if the biggest deportation in U.S. history -- 10 million Hispanics -- sounds chock full of dangerous and unintended consequences for all, it would only pander to Hispanics who are as cruel and blind as their fellow white extremists.