Nigel Farage is not considered an upper-class aristocrat. He comes from a middle-class background; his father was a stockbroker. While he attended Dulwich College, a prestigious private school, his career path—working in the City of London as a commodities trader before entering politics—aligns more with the upper-middle class than the aristocracy. He does not come from a titled or landowning family, which are key markers of the British aristocracy.
My guess is that Nigel Farage sees Tommy Robinson as a “hooligan”.
Farage is absolutely despicable for turning his back on a UK citizen for speaking out on government corruption.