The left's fondness for using the term "wingnut" for right-wingers has puzzled me for a while, as the term refers to extremism yet does not indicate which direction that extremism goes - applying just as much to themselves as their opposition.
I suppose it is yet another indication of their tendency to "project".
The lefties lifted the term ‘wingnut’ from Free Republic where yours truly first used it nigh on 10 years ago!!