Imagine you’ve gone to a different country, one where people speak your language but the way they live their lives is completely different to how you do it. Any time you ask someone a question, like what sort of currency they use or what public transport is available, they look at you like you’re crazy and tell you that you should already know. Worse, every so often, others will tease you and point you out to other people as someone who doesn’t get the simplest things. Angry, frustrated and confused, you give up asking questions and try to avoid having to speak to anyone about things you don’t understand. You try to work out what’s going on by watching the other people around you and trying to copy what you see for the duration of your stay.
Now imagine that you are autistic, that that country is your society, and the duration of your stay is the rest of your life. This is the reality for autistic people.