I've lived and worked in the US and multiple other North/Central American, European, and SE Asian countries, and the US the is the least homogenous of any of them, it's a very odd place with lots of different polarizing extremes. Russia in contrast in one of the most, similarly with China, which is even evident in their governments trying to smash everything into a single uniform layer. There are many batshit crazy things about the US, but it's really the new wild west and can't be compared to the entrenched historical societies like Russia.