Based on the fact that a group of eight or so people with Confederate flags, tattoos and armed and wearing body armor went out of their way to pose, in front of a BLM protest, all making that sign.

"wasn't meant that way" - you're going have to try harder than that. Saying "oh, they meant nothing inflammatory, even though they're the group (3%ers) who are most associated with the nefarious intent and are absolutely aware of it's purported meaning" is wilfully disingenuous.