[zahlman]

Being a "troll" connotes bad faith, i.e. not believing one's own accusations.

From the footage I've seen of Kramnik, I think he does believe himself, and is just generally very "salty" about losing (as the kids say).

[valiant55]

I don't believe the strength of ones convictions factors into whether they are a troll or not. Take patent trolls for example.