I also hate the stereotype that Autistic people, especially those with high support needs and/or IDD are 'aggressive'. First of all, many higher support need Autistics have a strong body/mind mismatch. Their body isn't doing what they want it to.
This is straight from the 'mouth' (fingers) of my nonspeaking son, who has body/mind mismatch challenges. He has typed that he has a hard time controlling his body, and sometimes he doesn't even know why he does what he does.
Secondly, 'aggression' is often just a manifestation of being overwhelmed. I've mentioned this a few times in regards to myself, but I've also witnessed it with my son. It's uncommon, but if not given the proper support, overwhelm can look like anger.
End the unfair stereotype about supposed aggression. And, especially end responding to 'aggression' WITH aggression. What Autistic people NEED in those moments, is CALM, not more high strung energy.
Too many people will meet a meltdown with strong behavior and emotions - in an attempt to 'control' it, instead of offering a calm, supportive response to help the Autistic person safely ride through it. Then, it becomes a harsh circle and the Autistic person is vilified.
Even if an outsider may think a meltdown looks 'scary', it's far scarier for the Autistic person experiencing it. No Autistic person wants to have a meltdown. Don't add to their stress. End stereotypes. Support people BEFORE they end up at extreme behaviors.