If there isn’t at least some non-zero amount of tin-snips and turpentine, then the protest is a parade.
Coincidentally, Lowes is having a black friday on tin snips: https://www.lowes.com/pl/hand-tools/cutting-crimping-tools/tin-snips/on-sale/4294857583-2
Turpentine I can understand having for various reasons (lighting shit on fire, removing paint/ink/pepperspray), but what is the need for tin snips? cutting the zip-tie handcuffs used by riot police?
I think they’re for performing the vasectomies as alluded to in the second panel. I assumed the turps is for make-shift antiseptic.
OP just made it sound like they are needed for any type of protest or demonstration, so I assumed they had use beyond just reproductive rights marches. Plus, turpentine can be used as an antiseptic, but there are lots of less conspicuous antiseptics available.
I like your answer, too, though.