after St. Louis police unions instructed officers to publicly display The Punisher's insignia (the mark of a lawless, fascist murderer) the comic book community was quick to point out the stupidity, and the frankly horrifying message sent by supposed peace officers endorsing a maniac. So it's a good thing The Punisher personally confirms he hates cops who see him as a friend… making every cop who "wears his mark" or calls themselves a "fan" look like shameful fool in the process.
-- Andrew Dyce, The Punisher Confirms: He HATES Cops Who Support Him
A fascist is someone who supports a single strong leader with total control of the nation. 'Dictator' was an actual position in the Roman Republic; the people could vote to give one man absolute power for a period of time. Makes sense if you're dealing with a natural disaster or invasion and don't have time to go through the usual channels. Fascism became popular in the chaos of the post WW1 era. Things were changing rapidly, and conservatives wanted to rein in the 'undesirables.' Ironically, the Communist Russian Revolution was a huge spur to the creation of numerous fascist parties across Europe.
Frank Castle, the Punisher, is not a fascist. He isn't interested in taking power for himself, and doesn't want a dictator. He often speaks of having the greatest respect for Captain America, the guy who always chooses the side of liberty and fair play. Frank knows that he's a criminal and a murderer. He just doesn't care. IMHO if he and the Joker were both locked up and unable to kill each other, the two would get along fine.
The Batman Punisher crossover has what you're looking for. Bats stops Frank from ventilating Joker's forehead.
If I was a particularly malicious comics writer I would make that the crossover universe the Injustice universe.
I want Mark Hamill Joker and Brad Garrett as Frank. BTW I've see Brad in person, and he's a giant. Would have been perfect for Jack Reacher, instead of the pretty boy they used.
Stares at the camera sadly
Conversation? He's not Batman. Frank Castle would straight up annihilate Joker.
Even captain america does plenty of fascist things mate, Punisher is definitely very close to fascism by the mere fact that he represents someone who thinks they are above the law and they know better and that they can deliver their version of justice.
Of course that alone doesn't make him fascist, but the things superheroes are portrayed doing nowadays are very much things fascists like.
Id recommend checking out this excellent video from Folding Ideas for example
https://youtu.be/xLUvR8zKbh0?si=H-cHenS9AfuXbJiW