Casey Kasem had already made his wishes known on the subject of artificially prolonging his life with food and water. He did not want life support in this way to be the only thing keeping him alive so his family are well within their rights to permit the end of life measures to be put into action and thus support his wishes.
We don't know all of the specifics. That's the problem with the public sticking their nose into situations like this. It just makes it more challenging for the families who are generally trying to do the right thing for their families. This is a private issue and we need to keep our noses out of it. There is oversight in the issue and we should leave it at that.
Yes, Casey Kasem's family should be permitted to deny him food and water, and hasten his death, because he is at a point where he is not able to decide for himself. Kasem does not have the faculties to make his won decision. Denying nutrition is what happens when a person no longer has a chance to recover.
I believe that Kasem should be provided at least food and water, in order to minimize the suffering of his final days. I am not opposed to pulling life support to hasten the death of someone in agony, but denying Kasem food and water only increases the agony of the life he has remaining.