In brief, leftist extremism is fun, while right-wing extremism is work.I might also add that it's the difference between wholesale and retail. A right-winger my decide he's fed up with a specific person, and that person will disappear in the night, like Jimmy Hoffa. The left tends to generalize to the point that sending the entire population of Kansas, for example, to the camps*, seems like the safest approach.
*Ayers College, a continuing education center for the congenitally recalcitrant. It is expected to be fully funded in the upcoming education bill, which you will be allowed to see as soon as it's signed.