Complex sentence: Shachtmanites believe that the Stalinist rulers of Communist countries are a new (ruling) class, distinct from the workers; therefore, they go beyond Trotsky's description of Stalinist Russia as being a "degenerated workers' state".
Split into simpler sentences: Shachtmanites believe that the Stalinist rulers of Communist countries are a new (ruling) class, distinct from the workers. Therefore, they go beyond Trotsky's description of Stalinist Russia as being a "degenerated workers' state".