Cherrypicking the most obscure text by Trotsky imaginable, even then proceeding to ignore all context of and exaggerate what was said, and then claiming modern Trotskyists say the Soviet Union was "red fascist" because they took their ideas from the above obscure text (neither is true). Magnificient.
The full paragraph, without anything omitted "for the convenience of the reader" (machine translated from French, because there seems to be no full English translation after a brief search - does that tell you anything about the text's importance?):
Fedor Butenko took the plunge to fascism. Did he have to deny himself a lot? To fight against himself? We do not think so. A considerable – and increasingly important – part of the Soviet apparatus is made up of fascists who have not yet recognized themselves as such. The identification between the Soviet regime as a whole and fascism is a historical error to which ultra-leftist dilettantes are inclined, who ignore what fundamentally differentiates the social bases of these two regimes. But the symmetry of political superstructures, the similarity of totalitarian methods and psychological types is striking. Butenko is a symptom of great importance: he shows us what the careerists of the Stalinist school are in their natural state.
The context is that Butenko, the Soviet envoy to Romania about whom this paragraph speaks about, had actually renounced communism and defected from the USSR to fascist Italy earlier in 1938. To remark on the bureaucracy producing such people is completely different from shouting "red fascism" because a CIA-funded radio station told you to.
What point is there to make?
This applies equally little to "modern Trotskyists", and claiming anything to the contrary betrays a distinct lack of investigation with an overabundance of speaking.
Verification is trivial: pick your favourite trot website and look up "red fascism".