Based on the answers so far I'm very glad I don't live in the US.
Obviously everyone should have the same fundamental human rights. Black people have been, and still are, denied many of these rights. The right to choose where to live, the right not to be hassled by police for no reason, the right not to be excluded from jobs because of skin color.
Due to long term continuing racism many people see a need to mandate some limits and goals based on skin color to overcome the current problems. As per Reagan-era studies attempting to debunk it, affirmative action increases hiring of minorities and has no measurable impact on non-minorities. That is some people get jobs that they would have been refused based on their skin color and the people who did not get the job find other work.
The work force is not zero sum. It costs everyone money to discriminate against people, harass them, and keep them poor. If those people are given opportunities for education and employment they consume and create more jobs, exactly the way tax cuts for the rich don't.
Obviously all lives matter but some people are being killed without consequences and most of those are not blue or white. If your cousin's husband/wife dies and they ask for sympathy you don't say "everyone dies, not just your spouse," at least not unless you lack empathy. You should think about the consequences.
I would put most of these responses down to Russian trolls or whatever but I've visited the US enough times to know that overt racism is pretty common (I'm white, but that doesn't mean I want to hear racist diatribes).
It's in everyone's best interest to fix the system, make everyone better off, including "illegal" immigrants brought in to pick crops etc. And yes, we do the same thing here in Canada, bring in people, deny them rights, and get them to work cheaply. It's wrong here too.
Moderation to oblivion...