[flagged]
I personally know white collar professionals who were turned back at the border for having a B1 visa instead of a TN visa for temporary work, while another person in their group was let through with no problem. They've been using the same kind of visa for a decade before this. And they were white dudes from Canada.
My Mexican friends said they're not stepping foot in the US for the foreseeable future, and I don't blame them. They have families and can't risk being disappeared and potentially killed because of some idiot border agent.
You forgot that. It's not that black and white (pun fully intended). But it's not not that black and white either.