Based on this answer I have the impression this is the same "fascism" troll that occasionally posts antisemitic remarks as well.
I dubbed them the "fascism" troll because one of their recurring themes was to ask on politics SE if fascism will succeed "in the end"... and many variations on that.
Economists being "always wrong" seems to be a new theme of them...
On Politics SE a measure was taken to prohibit unregistered users from posting. This ups the bar somewhat, but not a whole lot.