Where does the article engage in hasty generalization?
I've no doubt that some "young" people disrespect "old" people simply because they are "old." By the same token, some "old" people disrespect "young" people simply because they are "young." This is nuts. Respect people who are worthy of respect regardless of age (conversely, sadly, many people don't do much worthy of respect, again regardless of age). Back to my original comment: can we just stop with this kind of generational pot shots?
Nowhere does the author say that. Your whole comment is a strawman.