No wonder Christians look bad.
Indeed. Mr. Robertson needs to remember a tiny little incident in Christ's ministry that involved a blind son. Remember?
And as [Jesus] passed by, he saw a man which was blind from [his] birth. And his disciples asked him, saying, Master, who did sin, this man, or his parents, that he was born blind? Jesus answered, Neither hath this man sinned, nor his parents: but that the works of God should be made manifest in him. (John 9:1-3)