Autism has levels and using autism as an insult is actually not offensive but idiotic as fuck because there's levels of severity of autism. People with level 1 autism are actually usually smarter then people without it.
Justine: Good morning, guys! How did you sleep?
Carla: Not very well.
Justine: why?
Carla: I heard you using the microwave last night..
Justine: Oh dear..
'You're just jealous because you heard HER using the microwave but you can't handle that heat!'