One can't evaluate movements in a patient known to be definitively brain dead (no blood flow to the brain, and meets all other diagnostic criteria) without taking ALL the diagnostic information into account. If the child is brain dead (and I believe this child has had numerous imaging and diagnostic studies), then these kind of movements are spinal reflex arc movements-- no matter how heart wrenching or persuasive they may be to watch.
Watch the video from Brazil I linked above-- that man had the vent removed, and produced that classic Lazarus sign. He was unquestionably brain dead. If one googles "brain death and spinal reflex arc movements, there will be thousands of articles, videos, and explanations. I just did this and got 20,200 results returned.
Brain dead patients can have a lot of involuntary somatic shivering movements, limb movements, etc in response to touch, ventilator manipulations, being turned in bed, etc. It is very disconcerting for family to see this. It makes them think medical professionals are lying to them. It is our duty to explain what they are seeing, and give them the ENTIRE picture of what's going on, including diagnostic imaging and other studies. To compassionately teach.
The child Israel is beautiful, with not a mark on him except for the medical equipment. It's particularly and miserably hard for grieving parents to believe that what has happened inside his head is so catastrophic, when his heart beats, he is warm, and he is so beautiful. He cannot recover, at all. To accept that, for some, is to descend into a pit of madness and grief, from which they may not emerge. I get it. It's thoroughly, completely devastating. But no less true.
The courts are not helping in these situations, IMO. They only prolong false hope, encourage more litigation, foster confusion in the parents and the public, and delay the inevitable. These decisions, IMO, don't belong in courts.