I grew up UU and worked for the UUA in the early 2000's for about 6 years. After seeing how the sauce is made, I walked away and never looked back on the religion. The UUA leadership, including the UUMA, and staff are the most self-aggrandizing, white savor complex, power hungry, narcissists you can possibly imagine.
Most of the cancellation mentioned in the article was happening to dissenting voices even back then, but it was behind closed doors without wide spread recognition. Additionally they suffered from the same issues as any religious organization, e.g. financial misuse, moving problematic ministers to different congregations and covering up the allegations.
Wanted to add the UUA has always been a close minded organization, regardless of what they profess. From the first day there I was exposed to extreme anti Catholic bigotry. These people hated Catholics with the fire of a thousand suns.
They feel that they personally can save the world, but in reality it is a closed minded social club that is not tolerant to outsiders or new members (thus the historic declining membership), or dissenting voices.
I could go on for hours about the issues with that place.