remember that angry mobs beating cops and trying to kill members of congress and vice presidents pose no threat to anyone (as long as they are rightists and not leftists). Babbitt was killed by the last line of cops protecting members of congress. And she was warned.
What happened was fine, in terms of policework:
At 2:44 p.m., law enforcement were trying to "defend two fronts" to the House Chamber, and "a lot of members [of Congress] and staff that were in danger at the time".[50][51] Pipe bombs had been discovered outside the Democratic National Committee and the Republican National Committee,[52][53] and Capitol Police officers had been warned that many attackers were carrying concealed weapons.[54]
Babbitt, wearing a Trump flag as a cape, was among several dozen rioters who approached the doors to the Speaker's Lobby, adjacent to the House chambers.[7][55] Three uniformed officers were posted outside the Lobby where they were threatened by the crowd. One member of the mob yelled, "F'ck the Blue" (blue being a reference to the police). One officer guarding the doors told the others "They're ready to roll", and the three officers moved away from the barricaded doors leading to the Speaker's Lobby.[7] No longer impeded by police, rioter Zachary Jordan Alam smashed a glass window beside the doors.[13][56] On the other side of those doors, many lawmakers and staff were being evacuated by Capitol Police,[7] but some were trapped in the House balcony.[57]
After "he's got a gun" was yelled several times when Lieutenant Michael Byrd aimed his weapon,[58] Babbitt, hoisted by two men,[19] began to climb through the shattered window. She was then shot in the left shoulder[10] by Lieutenant Byrd[11][7] and fell back among the other protesters.[19] Babbitt had been warned not to proceed through the window: one witness recalled that "A number of police and Secret Service were saying 'Get back! Get down! Get out of the way!'; [Babbitt] didn't heed the call."[59]