What's the noun for Trotskyists? Here's the word you're looking for.
Trotskyism
The left-wing political philosophy named after and based on the ideas of Leon Trotsky that is characterized by international socialism, opposition to Stalinism, the theory of permanent revolution and the theory of the vanguard party.
“Trot beside breaking waves with your criollo steed at Playa Negra, one of Costa Rica's best surf breaks, and stay in beachfront bungalows.”
“Yet from 1941 he found the Trot temperament to be almost indistinguishable from the Stalinist one and fled that totalitarianism also.”
“Unless, of course, Scotland takes a collective brainstorm and opts for the Green Trot Nat coalition which united last week around the separatist standard.”