It's much easier to stifle disagreement and feign objectivity after you silence a publicly accessible conversation and move it to a private Discord server. Discord makes it remarkably easy to censor comments without ever being able to prove they were there.
Even if we assume the Kagi CEO is totally blameless, he made a massive optical blunder by deciding to silence public criticism and shift it onto turf he controls even more tightly.
If you want to make the case that the two Mastodon users are liars, then you need to prove more than a personal disagreement. And so far, arguing about one of the hardest to define words in the English language is hardly proof.