Your claims here are something I've heard repeated from people before but I've never seen much substance to them. Especially the idea that being non-white or LGBT is non-minority online much of anywhere.
Do you have any non-anecdotal data to back those up?
There certainly is evidence active participants tend to skew a certain way on e.g. Twitter and Reddit. These participants are predominantly left-wing. "Do you have any data" you can Google it, it is well known.
The majority itself is passive. The majority of active participants are left wing and skew young, which by extension are generally pro-inclusion. Anti-diversity standpoints are a minority except for specific cases.
And really, it would be strange if it wasn't, considering the encouragement of anything unfavorable towards a minority is grounds for getting yourself on the fast track to the banlist.
That's the point. People in these discussions act like the majority are unenlightened bigots trying to return things to the 19th century. That's not true, and practice shows it.
Do you have any non-anecdotal data to back those up?