The poorest people in this country are black and brown. The first people impacted by environmental disasters (and soon climate change) will be black and brown (Katrina, oil spills, [1]). That's why the people you decry as focusing too much on identity politics are at the forefront of pushing for universal healthcare, broader safety nets, and environmental regulations.
[1] https://www.theatlantic.com/video/index/529137/environmental...