Seems to be an "apolitical organisation" thrown together to attack the royals via this issue...

I don't know whether they're cool or not, critical support? I found this 40minute interview with the lead organiser by some nobody that might be worth a watch to really judge whether they're trash or not.

EDIT: This video uploader seems like a far right nationalist nut, just looking through his videos now, they're all stolen with a new splash screen thrown on them though. I can't find the original source of this video.

EDIT2: I found the original here https://youtu.be/fAoWFgQ_XNI

Interviewer is 100% a QAnon nut: https://youtu.be/I8wF-VPFG8A

My judgement -- the organisers and people screaming are probably QAnon fanatics too.