The approach seems fairly reasonable, it sounds like it's limited to explicitly violent extremist content, and it's being done using pension funds of various governments in a activist investment manner to try to bring about changes
And historically, efforts to curb uncritical airtime for violent and dangerous people have been fairly common (albeit not entirely uncontroversial). Neither Ireland nor the UK were ever far left or fascist but RTÉ and the BBC both heavily restricted interviews with loyalist and republican paramilitaries during the Troubles in Northern Ireland.
The old definition was about republic vs monarchy. Now everyone keeps using those labels. Conservative? Right wing. Socially conservative? Right wing. Economically conservative. Left wing. Weird!
Authoritative government that's socially conservative; Venezuela. Wait what? Thought they were labelled far left?
Left and right labels are pointless, refer to the parties for what they represent; social conservatives; authoritarian; etc
https://en.m.wikipedia.org/wiki/Left–right_political_spectru...
This particular pathology seems to arise from the idea that "far $TYPE" is inherently de-legitmizing. And once you've de-legitimized someone or some position, you don't actually have to take them seriously, so...