I genuinely don't understand the point this author is trying to make. Anyone who reads a server's About Page can get all of this same information from their blocklist if reasons are listed. And the author's enlightened centrist "we don't have red and blue politics in Japan" is total bullshit. The Japanese parliament is a neoliberal institution inspired by western legislatures, with conservative, liberal, and even social democratic parties. Feigning ignorance in this matter and claiming mysterious foreign political forces are at work just shows how politically uneducated the author is.
They seem to have a soft spot for lolicon, which is gross regardless of legality. Users have the right to not see child fetish art on their timeline.
I think it's really telling that conservative instances are offended when liberal or leftist instances block them. Their egos can't handle not being able to reach someone. But the claim that liberal and leftist instances block conservative instances "for no reason" is just false. They're extremely racist, use loads of eugenics dogwhistles, and actively attack lgbt users. Any instance that defederates from a conservative instance and hardening their instance against scraping is totally justified in avoiding conservative anti-social behavior. Ghouls can get fucked and they deserve to be alone.