I wish I could buy this, but you really don't want it to be illegal to say "politician X is a murderer", because they started a war or denied food to orphans or

I wish I could buy this, but you really don't want it to be illegal to say "politician X is a murderer", because they started a war or denied food to orphans or something. I don't know if there's a viable way to draw the line between that and the case in the article. (Note: safety from crazy people who believe the claim doesn't work, since people are definitely going to go after politician X.