This confrontation highlights a street fighting tactic antifa employs regularly, namely having weaker members confront/distract while the hard core members hang back waiting for an opportunity to strike.
You're right about that, these Marxist agitators are knowingly Decoys and they operate to distract situational awareness so the armed and armored Antifa Thugs can blindside from ambush.
Truly Cowards, in every sense of the word.