I'm not sure trials for defamation/libel etc are the way to go. I mean, how could anyone prove cheating (unless they were literally observed or confessed)? It would fuel paranoia even more, and would be some crazy psychological warfare to tie up opponents in expensive legal dealings before a tournament etc ....
I don't know what the answer to cheating is in the age of engines???
Additionally, Kramnik is deleting various comments that oppose his views on the blog in order to try and form an echochamber.
And btw, I wrote a blog about the situation for those who want to see why Kramnik's clearly wrong: https://www.chess.com/blog/SavageOppress/did-gm-hikaru-nakamura-cheat-uhhh-no