Yeah ASD is weird territory. It's generally a good idea to avoid charities involving ASD unless they're explicitly only helping children/adults/families obtain resources/therapy whatever that they need, because there's a huge divergence on how autism should be handled in society.
A major problem with a lot of autism charities is that they try to sell this idea of "curing autism", but it's neurological, so by doing that you're essentially erasing what made that person a person. People kind of view it like a lobotomy, except that you seem to function "normally". Some people think that ASD in most cases should be treated as a different function than an improper function, and I personally feel that ASD isn't really a bad thing as long as the individual is able to communicate with others and the others in question respect the boundaries of the person with ASD.
Autism Speaks has an absolutely atrocious track record, and even though I usually avoid linking from tumblr due to some crazy **** on there, this post is a pretty good resource of their ********. I can't understand how people can honestly defend an organization that thinks it's okay to make ads that feel bad for the parents and saying they'd rather have their kid dead while the kid is in the room. It's ****ed up ****.
So yeah, it's complicated.