"valuing different things" and "assessment that various things will go wrong is different" would seem to incorporate "evil" and "stupid" quite comfortably.
So both work. But they have such different effects on the person you are debating with, and for most of us, they have a different effect on ourselves and how we see reality. Choose the "evil" and "stupid" labels, and you close off rational discussion, or at least you do your part in closing it off, you may well have help from the other people in the discussion.
If the goal of policy debate is to settle on good policies, you do not want to choose the "evil" and "stupid" labels.
So both work. But they have such different effects on the person you are debating with, and for most of us, they have a different effect on ourselves and how we see reality. Choose the "evil" and "stupid" labels, and you close off rational discussion, or at least you do your part in closing it off, you may well have help from the other people in the discussion.
The problem that I am alluding to is that the quote attempts to persuade via an implicit false dichotomy and also subtly equivocates between the concepts "don't use excess...
Another month has passed and here is a new rationality quotes thread. The usual rules are: