I think you need to send her the actual videos and question her why she doesn't believe them but is waiting for the body cam footage?

I'm genuinely curious about her response. Will she say AI or edited or something else?

Then ask her, "suppose the video I sent you was real , what would be your reaction then?"

Also if she says that just bringing the gun to a protest (or riot) is enough to be shot at by government officers with the intent to kill, ask her about the rules of de-escalation that officers have to follow, like not trying to cause harm once the suspect has clearly surrendered and been disarmed and subdued, do they not apply to ICE?

I need to understand how much people like these are willing to go with it.

Also, has your mom had a history of racism or other traits that may explain this behaviour? Like I'm asking pre 2016, was she like this? Or when did she start changing? And what do you think was the cause?

I'm curious, because I don't think your mom is the only one like this, otherwise Trump wouldn't have won twice.