I’m not sure it classifies as an emotion (nor does stupidity, for that matter), but it probably does exist as a motivation for some human acts, with the relevant emotion usually being anger.
I don’t think your distinction (harm for its own sake, distinct from harm with a motivation) is real, unless you think there are un-caused actions in other realms, or you discount some motivations (like anger or hatred) as “not valid” for some reason.
I’m not sure it classifies as an emotion (nor does stupidity, for that matter), but it probably does exist as a motivation for some human acts, with the relevant emotion usually being anger.
I don’t think your distinction (harm for its own sake, distinct from harm with a motivation) is real, unless you think there are un-caused actions in other realms, or you discount some motivations (like anger or hatred) as “not valid” for some reason.