Watch As Capitol Security Chiefs Testify About Jan. 6

[ancianita]

12. ...

Was "Stand back" and "stand by" verbage to cue them in?

They saw it that way. We saw it that way, too. The fact that he repeatedly told them who and where to "fight like hell" was their real cue to act.

He was glad they saw it that way since we all saw that very phrase on all their clothing and online merch, right? Could they surmise that he'd help them? Of course. They trusted that enforcement backup might be weak, but they didn't take chances on that and came in big numbers once they found out how many police there would be there.
They came without lethal weapons, but also planned to come with whatever could be seen as innocent, yet be turned into weapons -- poles, fire extinguishers, ramming boards, plexiglass and other "protective" gear.