One tell that I think is obvious is the font. It's made to emulate being painted, but it obviously isn't (the artifacts on the first 'F' for example don't make sense for a brush, and many others). I would think maybe it's printed using a font that's supposed to look painted, but the letters are unique (each 'K' in "KKK" is totally different), so it isn't a print. That leaves either generative AI, a weird digital edit that manually did things incorrectly, or a very slim chance that it's real with a strange artistic choice. AI seems the most likely by far.

Fair. I replied to NickwithaC's comment about this, if you want to see some of the giveaways.

Lighting, font, cityscape, human orientation counter to his in a protest, lack of many other signs, generation artifacts, etc.

GenAI is never justifiable. There is no moral ground to stand on justifying it.