>However, should I and half a dozen of my buddies, armed an in full tactical gear, standing 10 ft from a BLM protest, waving my Confederate flags, all choose to make this sign for a photo, then a _reasonable person_ may choose to interpret this as "we know exactly what we're implying here, and we're not all just telling the cameraman that "everything is perfect"."

yeah, but that's the story required for your credulity.

another 'reasonable person' with an axe to grind could have a much more minimal story required for credulity, say someone resting their hand outside the window of their car, tweet the photo with a license plate, and ruin someones life.

my meaning : don't expect your reasonable demeanor is going to be the same as some other random bystanders' 'reasonable demeanor'.