According to what is reported, the priest did not deny the boy entrance to the church. He tried to work with the family and offer solutions, during Mass, to allow the boy access to Mass while protecting other parishioners. The family refused. It was because the family refused to work with the priest that he had to resort to the restraining order as a last resort to protect the community. This is not the boys fault, it is the parents fault.
They are the what is keeping this kid from Mass. Not his disability.
Shaking his hand when he gives the sign of the peace. Where was it ever reported that people were refusing to shake his hand? If that was the case, I would equally be outraged. But if I remember correctly, that happened to a poster here in this thread, not to this particular boy.
I had to answer this one. I have nerve damage in my right hand because of someone squeezing toooo hard. This person did not know his strength and broke a couple of bones. So I can understand not wanting to shake hands.
Also, if the young man is having problems with urinating and/or spitting I am not sure I would want to shake his had prior to communion. But, then this is just me.