It's not mentioned in this article, but the man in question has a long history of burglary and did four years for a string of thefts. It's likely a big part of why HIM carrying a 6'' blade is concerning.
It's an actual sharpened metal replica type of collectable, also in England people using ''but it's just a novelty knife'' as a defense has a long history at this point. It really wouldn't be safe to use as a fidget item, and it's not at all sold, or made as a fidget toy.