While the right thing to do is to show compassion and understanding, Christians are flawed people by nature and sometimes it's just impossible to act Christ-like 100% of the time. I'm not making excuses for this church or any congregation that is unhappy with a disruptive child. Clearly, this is an illness he can't help and I'm sure the family suffers more than anyone who may be temporarily put out during a service.
Like everyone has said, a little more background info on this story would be helpful.
There is a family that goes to my mom's church and they have a child with Tourette's. Outbursts and tics. Very disruptive obviously. But the family can't exactly help it. So, the mother and father take turns sitting in one of the nursery rooms where the services are shown on a TV screen.