You don't have to watch your words on 4chan though. You can literally just make fun of them.
You can larp as whoever you want to get a rise out of whoever you want. That is mostly what the site is. While you're larping as a nazi you're being exposed to every other political point of view, every gender, every race, and every sexuality.
How many real nazis do you think are comfortable looking at femboy threads all day? Is that really their choice forum? Hate speech and anthropomorphic dogs?