In high school, my girlfriend's dad was Mexican born to illegals in the US, and we found it bizarre that he was a huge Rush Limbaugh fan and Fox News fan and regularly ranted about the border. His parents were different than the drug dealers and criminals coming over "now" and they eventually did become citizens was the logic if you asked about his origins.
This is much less bizarre when you realize that Mexicans are, you know, not a homogeneous bloc and have their own divisions that might simply not be visible to you.
Imagine creating a single stereotype for everybody in the US, calling us "Americans" and assuming we have a single set of values and opinions - now contrast it with the reality of our polarizing politics where people have wildly different points of view.
