Don’t mock people for not understanding jokes or sarcasm! It’s pretty common for autistic people to have trouble telling when someone is joking or if they’re being serious, and to have trouble picking up on sarcasm. And its especially hard to tell over the internet. Also, if someone asks you to explain the joke, don’t be an ass, just do it. It doesn’t “ruin the joke”, it just allows more people to be in on it. If you want a good solution, start adding /s or /j (which stand for sarcasm and joke respectively) at the end of your joke so that neurodivergent people can pick up that it’s not serious.