There is a balance that can be struck.
I can understand why some people may just want to discuss cloth nappies. People with mental health difficulties may find it particularly difficult to engage in wider discussions. People from BME backgrounds may also wish to switch off. Things are very full on for people at the moment.
As other posters have highlighted, people may be turned off by the amount of coverage the BLM movement has generated.
Some individuals may not yet have become aware of what systemic racism is. The may be aware, but hold prejudiced views. They may well be racist.
Racism should be addressed when encountered. This seems to have happened.
However well meaning, it’s not the role of admins and members on a group like this to attempt to provide training on Equality for members. This could build further resentment. If there is a separate thread for this, I actually don’t see the problem as people can choose to participate or not. ( although then it will likely be an echo chamber).
You sound really passionate, as many people are right now. It’s also important to keep things in perspective, take a step back and play the long game when fighting for change.
I’ve noticed people ( including myself) being reactionary at the present moment, and that leads to disagreement rather than discussion. People get frustrated when others don’t view the world they way they do, and lash out. That doesn’t challenge racism, it becomes too personal.
I’ve spent a bit of time reflecting, and I think that little bits and pieces of awareness raising, in a variety of contexts, like the pp spoke of on the breastfeeding group are likely to be more effective.