Interesting ideas there, thank you for posting the link, but I suspect skirting round the central point to emerge from all this: the USA has a huge problem with race which is still unresolved despite the Civil War. The present leadership appears to be stoking this up for all its worth because their political support depends on it. For example, "Make America Great Again" might have been a patriotic if rather trite slogan thirty years ago but when used today the context is completely different and it's read as "Make America White Again" by the leadership's political base. The leadership knows this, of course, which is why they constantly repeat it (twice today already, in capital letters). My fear is that if this very inflammatory behaviour continues then it will end in serious civil unrest.
The smarter foreign governments probably saw this coming long before the inauguration and they can't do much more than repudiate the most egregious claims and stay well clear. There's almost nothing the rest of the world can do beyond hope enough people of courage and conviction within the USA come together to halt it. I remember being shocked during my visit to Georgia a few years ago at the number of African Americans still living in what looked like shacks in the bush and we know that the stats for poverty and deprivation in some parts of the South would shame a newly developing country. The reality is that this will take decades to work out, but the sooner the work is started the sooner it will be done.
You've got it backwards. It's the Democrats and the left that play identity politics for power. They're the ones who always play the race card, gender card, etc. Black vs white, rich class vs poor class, male vs female, gay vs straight, etc. This division politics causes people to take sides for their own identity and protection. Most American don't care about these things. They just want to be left alone, treated fairly, and allowed to get on with their lives.
Making America Great Again is about making Americans, ALL Americans, great again. It's about doing away with these artificial separations. It's about making One country great again and not divided, not being the largest debtor nation in the world but rather being the largest creditor nation in the world as we once was, having countries respect us if not like us, giving everyone equal opportunity to be free and advance, etc.
There are huge swaths of America that are poor. But you only looked at the black poor. There are a lot of white America poor like that as well. Both black and white poor were forgotten about by the Democrats and Obama since the 2008 recession. Trump ran on telling them that he won't forget them. That he will get them jobs and turn the economy around for them as was for the better healed Americans over the last 8 years. All those black and white people who lost jobs to foreign countries, and bad trade deals, and the elite Democrats and Republicans who ignored them. That's why he won.
The Left and Democrats who keep stoking the ambers of hatred to divide us for their own power are the real un-Americans.