"Deserved" is a different thing than "justifiable reason".
To be clear, antifa guy arguably did have a justifiable reason if he feared for his life. However, he was likely an inexperienced little shit who had little idea of the operation of the weapon he was holding and knew he was in the wrong being confronted by a guy exhibiting confidence with a loaded weapon already drawn. He made the right decision and went home that night.
So that hero that got back the stolen rifles out of a cop's car, from ANTIFA, deserved to be shot?
They weren't antifa's rifles, so no.
To be clear, antifa guy arguably did have a justifiable reason if he feared for his life. However, he was likely an inexperienced little shit who had little idea of the operation of the weapon he was holding and knew he was in the wrong being confronted by a guy exhibiting confidence with a loaded weapon already drawn. He made the right decision and went home that night.