The quote is taken from the British philosopher Bertrand Russell's essay on Fascim in 1940,
"The first step in a fascist movement is the combination under an energetic leader of a number of men who possess more than the average share of leisure, brutality, and stupidity. The next step is to fascinate fools and muzzle the intelligent, by emotional excitement on the one hand and terrorism on the other."
To me it sums them up, but it sums up a lot of the far right in general. The same could be said about Farage and many of his supporters too.