I agree. The church has no specific document on this subject, except that the church has always taught that accomodations should be made for disabled persons wherever possible. There are also numerous statements about the Eucharistic celebration and the importance of the disabled being there where they represent the fullness of humanity. the Church also teaches that the mass is the source and summit of christisn life and when a child is baptized the parents agree to raise the child in the Catholic faith. So, putting those two ideas together, it follows that parents have an obligation to take their autistic children to Mass, at least on holy days of obligation. Now, if the child is truly dangerous, as some of claimed of my son, then I think very stringent accomodations would need to be made to protect others at Mass, however, the stories purported about my son are either entirely false or are gross exagerations of the truth. I do feel only minimal accomodations are needed, and they have not been offered, let alone implemented at St. Joseph's Church. My entire family is now attending another parish.
To my knowledge, the Church
To my knowledge, the Church has never relased any particular guidelines on any special affliction, save maybe for AIDS, leprosy and homosexuality.
It's a good idea to distinguish between what happened at a local parish, ie a church with a small c, and the general view of the Church, with a big C.
It might be just some small incident we're dealing with that has nothing to do with the Church's overall tolerance and respect for people which such syndromes.
Before talking to the Pope, you should try to have a dialogue with the local diocese, pastor and bishop. Was the local pastor simply disciplining someone who was misbehaving ? The USCCB (American group of bishops) might also have some interesting information points to make.