I know the decision has been made, but this is 'My take' on the situation.(as a former health professional)
There is a saying 'Where there is life, there is hope' However, IMHO quality of life should outweigh Quantity of life. I think that the Gards should have thought more about their childs situation, and not about how they feel. I personally would not have put my child through 'A three-ringed circus'. Where is the dignity in that?
Sorry if this has offended anyone, but this little boy is a human being and not 'an exhibit in a side show',