I think the user you replied to is referring to things like the Putnam findings on the effects of diversity https://drive.google.com/file/d/1FvFN8ACY6taivkcbzDGgYy1-EPb...
Also relevant: https://www.pewresearch.org/2025/05/08/americans-trust-in-on...
Also relevant: https://www.pewresearch.org/2025/05/08/americans-trust-in-on...