"77% of Latinos, 69% of African Americans, and 64% of Asian Americans support building more housing in their local areas, compared with 53% of whites.”
http://www.ppic.org/publication/californians-and-housing-aff...
...oppose development, it's mostly upper middle class whites
Wait for it... 53% of whites (*support* building more housing)
Your own quote literally belies your claim. A valid conclusion from that source is that "whites support more housing but at lower rates than (other ethnicities)", but that's not opposition.1 a : to give a false impression of: "Her gentleness belies her strength."
b : to present an appearance not in agreement with: "His manner and appearance belie his age."
https://www.merriam-webster.com/dictionary/belie
To say "it's mostly upper middle class whites" does give a false impression of what the study said.
Do you have other sources that support that statement?
You just don't see them because "visible" to us here means posting on HN or Medium or Twitter.
There's just a huge gulf between the local and global people that we need to transcend.
The anti-development left is, for a variety of reasons, not terribly visible. Poor people of color lack visibility in the first place, and so do the more extreme leftists. So you multiply those together, and you're not going to get a movement that commands a lot of attention.
The other issue with finding unified op-eds against YIMBYs is that these battles are literally fought building by building. If you really want a detailed look at the debates that showcases both sides, you'll have to start reading more local news. NIMBYs are generally quite happy to acknowledge that there's a statewide housing crisis, but they'll refuse to build anything in their own neighborhoods. NIMBYs don't need to be a unified force to get their way. Whereas, YIMBYs seeking to enact statewide change via bills like SB827 do.