Pope John XXIII was a very revered and open minded pope who brought a breath of fresh air to the Roman Catholic Church. For that he at least deserves to be looked at in terms of being declared a saint. Obviously this would only make sense to Catholics, and a very long process needs to be undergone.
Declaring someone as a saint is a huge and life changing thing and the title should not be given to everyone regardless if you were a pope or president or whatever your title may be. I do not think that they rightfully earned the title of a saint and it shouldnt happen.