> Even if you're right, you're still dead.
Yes, this is the entire point: the left is saying "the government shouldn't murder citizens for exercising their legal rights", and the right is saying "if you exercise your legal rights, it's your fault if the government murders you" (or at least "that's the risk you run").
If American patriotism has anything at all to do with valuing freedom from tyranny and oppression, then the right-wing mindset ("you might have the 'legal right' to film an officer, but the state might murder you for it") seems aggressively un-American. Specifically, if you have "the right to do X but the government might murder you for doing X" then you don't really have the right to do X by definition.
Lots of things that are legal are deadly.
For what it's worth, I don't even see this specific incident as government persecution. It looks like plain murder. Murder by a government employee, but murder nonetheless.