This is it, notice how Google Trends[1] shows a rise in “30 year old boomer” not long before “boomer shooter” becomes more commonplace. It’s just the whole applying “boomer” to things like being stuck in their ways or boomer-like behavior, rather than age, that took off a few years back.
When I was in kbin and could see who voted because voting metadata is visible there, almost always left wing comments (e.g. supportive of trans rights) received downvotes from someone on lemmy.world while the upvotes were from multiple, varied instances. So I’m not sure kbin is the biggest problem unless things have changed since then
Me waiting for inflation to slowly increase Discord’s yearly revenue until it tips into the legally defined Gatekeeper™ status under the EU Digital Markets Act so they’d be playing with fire if they banned people for using interoperability apps.