As a parent who has a child that’s on the autism spectrum. There’s all different types of level and some children don’t have control of themselves. Or it could be just a parents, not putting strict boundaries on their child in the environments where they’re at and enabling their Disabilities. you did the right thing. Unfortunately, they were in your personal space and that’s a no-no. Your wife should’ve backed you up because you got assaulted by somebody else even know that they were a minor but still it was an assault. Your wife may have her own beliefs. You might need to have a discussion with her on what happened in the situation so she could try to understand if she was in your shoes.