Opinion should stay opinion. If the paper calls itself an opinion paper, then I’m not worried about lies. You expect people to completely taint opinion because opinion is tainted understanding from what others believe.
If the paper calls itself a newspaper, yet pumps out lies as truth in news articles, that is wrong. “Analysis” is something that can blur the two, but if stated as such, provides the right context.
It’s like putting the word “satire” on your article—it tells people that what is said has a certain context, as well.
If some expert is quoted in a newspaper as stating Trump had someone killed, would you expect that either that person, or that paper, should be able to be sued?
Under current law the paper could be sued if Trump could prove that it was false and that the paper knew it was false and published it to harm Trump.