I thought Scott Lilienfeld spelled out very clearly the problems with microaggressions in his paper "Microaggressions: Strong Claims, Inadequate Evidence". It's

I thought Scott Lilienfeld spelled out very clearly the problems with microaggressions in his paper "Microaggressions: Strong Claims, Inadequate Evidence". It's behind a paywall but the gist can be read here: https://aeon.co/essays/why-a-moratorium-on-microaggressions-policies-is-needed https://aeon.co/essays/why-a-moratorium-on-microaggressions-... In the paper he suggested areas for further study that could affirm the idea, but I've not seen any, based on the Google Scholar search I set up.