Actually, that would be the previous administration's policy for dealing with protesters: "When the looting starts the shooting starts." And since that administration was still in charge on January 6, based on that logic, the officer is a hero.
Fortunately, we have a new administration which has a new policy.
First of all no protestors were killed by the Trump administration in any event other than this one. Next you are changing the circumstances again, the crowd did not charge anyone, next I do not need and never have had to use a firearm to take control of any unruly unarmed person, I do not know of anyone who has other than the officer in this case.
Meanwhile, it's nice to know that if you are ever charged at by an angry mob, you'll keep your service weapon in your holster. They will appreciate it when they take it off your unconscious/dead body.