There's no better example of this than the discussion on health insurance here on HN a few days ago, where people with health insurance were opposing universal healthcare because they'd have to "compete with the general public for treatment access".
How do you fight it though? There's no incentive for anyone to willingly choose to have a worse personal situation for a greater good.
As an example, just in the last six months or so, I took considerable time and effort out of my day to help absolute strangers in two different occasions to change their flat tires. Both times I was soaked through in sweat by the time I was done, but I was happy to help. Does it follow from my willingness to do this that I would be in support of, say, a government program for roadside assistance (call it AAA-for-All)? Hell no.
America once excelled at civil society, but over time government has subsumed more and more of those functions; to everyone's detriment, if you asked me.
I'm not calling you prejudiced, to be clear, but your example of "we should all rely on each other to help out" is exactly what racists use to justify cutting welfare and saying communities and churches should handle it, for example, with the dogwhistle that only those "deserving" will get assistance. But "welfare queens" who dare to be Black? No support for them!
I'm not sure what part of the country you live in or what your background is, but it is my sincere belief that there are not nearly as many racists in America in this day and age as you imply. I live in a majority black city in a Deep South red state (and I myself am visibly nonwhite), and I observe nothing but pleasant interactions between people of all skin tones. It's honestly a strange difference from back when I lived in a stereotypically "coastal liberal elite" city in a blue state, where every other lawn had a BLM sign but approximately zero black people lived there. Here? Approximately zero BLM signs but people of different races being neighbors and getting along just fine.
Perhaps I'll be proven wrong, but it is my experience that outside of small pockets, there is no racism of the sort you describe, where someone may not extend private kindness to another because they're black or any other race.
In case you need a refresher of an example: https://en.wikipedia.org/wiki/Murder_of_Ahmaud_Arbery
I'm familiar with the Arbery tragedy. You're extrapolating from this and maybe other high-profile cases to make the argument that there are racists all over the country who are willing to kill. The actual data paints a different picture, with there having been anywhere from five to ten thousand reported hate crimes annually over the past decade or so, with only a few tens of those being murders. Statistically you're about as likely to be killed by a lightning strike as someone murdering you due to your race.
Your claim that people are "discriminated against regularly", of course, is too vague for me to counter.
Elect whichever "populist" politician offends the progressive reformers the most.
Democracy is still the best form of government I know of though. So if you don't live in one it is worth moving to one. Hopefully you can learn from the mistakes of those of us who have gone before and design protection for some more downside.