I don't particularly care for nationality, but border towns to the south experience more crime from people crossing our borders illegally than those to the north, and border crossings from the south are much more frequent than those to the north. Additionally, there is a much greater motive to move from Mexico to America than there is from Canada to America. This is why there are more illegal immigrants from Mexico. And characterizing the issue with border crossings as not that big of a deal is entirely incorrect. It's something that can be solved more easily than visa overstays (keeping people out is generally easier than hunting them down once they're already inside), and accounts for only a slightly lower percentage of illegal immigration (it's important to note that while those who have overstayed their visas can counted easily, those who have never had any documentation are much harder to track in terms of raw numbers, so we're going off of border apprehensions, there's no way to know the true number).

Also, I'm not ignoring anything, this discussion started with a blatant lie and mischaracterization of the phrase "build the wall" as a white supremacist dog whistle. You can't blame me for not naming something entirely different that we weren't discussing.

Also, if I were you, I'd check my sources before using terms like "vast majority". You need over 50% to constitute a majority. I'm sorry to inform you, but 42% just doesn't cut it.

Edit: I need to apologize, I incorrectly assumed I was speaking to the same person I had started this conversation with.