I've had a few events so far where the discussion/feedback part had 1-2 white guys doing longgggg monologues about something unrelated to the main topic. Last time had some stoner guy ranting about the confusing service at airports here (the event was about Gaza). Before that it was some boomer guy trying to explain Madonna to the non-white teens in our group (the event was about trans rights). Sometimes it's just two white guys monologuing back and forth. It's super counter productive and cringe.
I'm just thinking of a hard rule. Like "if you're a white guy, you're welcome, but please try to listen more and keep unrelated monologues to a minimum."
For the record, I am a white dude.
There was a place I used to go to that had a bit of a problem with this. It ended up becoming less of a problem without any intervention, as the one guy was booted from the group for threatening someone... But what I had suggested to another group member before that point as a potential solution to the "holy hell just shut the fuck up" problem, was an anonymous poll of sorts. I don't know how this would be done exactly, but it would if nothing else mean that no-one would individually have to come forward to say "shut up".
What I should mention is that this group was a welfare contractor. No other group I've been a part of, be it a support group or a leftist org, has had a problem with this. So that you're experiencing this points to a structural issue within the org.
An app where everyone in the audience or meeting or whatever can anonymously vote for the person to stfu and a light turns on when the vote hits a threshold. Threshold can be determined by how long they've been talking