A child with disabilities is a special gift from God. If parents hold that belief, fine, and you should respect it. However, from a caregiver's point of view, this is not a productive attitude. Treat and care for this child as you do all the other children in your care. A child with disabilities is God's way of punishing a parent.
Children are children.
A child with disabilities is to be pitied. Pity is not productive. Support is productive, so is love and positive encouragement. You have to be an expert to take care of a child with disabilities. Don't diminish the value of your experience with other children when you evaluate your ability to care for a child with special needs or disabilities.