Another word for (aspects of) spite is Schadenfreude - but this is more often treated as an amusing foible, trivialized; than recognized as among the worst of evils.
Surely we can all, if honest, recognize in ourselves (and infer in others) this most evil of evils: a desire to harm others, to make others suffer: a motivation that will, at extremes, risk or sacrifice even oneself?
Surely we have all felt an arising impulse that responds to awareness of happiness, beauty, moral decency, honesty in other people or the world around us... with an impulse of hatred, the urge to destroy it, to smash it.
We observe perfection; and then a stab of desire to mar that perfection. The urge may even be yielded to, when "harmless" - as when we see a perfect reflection cast by a still pool of water... And then respond by smashing it to smithereens by hurling a rock into it!
"Harmless" fun, maybe - a tiny lapse, in the scheme of things; no lasting harm done... Yet if we examine the motivations for such everyday (trivial) destructions, we may (if honest) find spite at the root of it.
Likewise for our actions against others. These may be rationalized as necessary, or because "he deserves it"; but at root, the motivation may be spiteful: "I want to see him suffer".
Most people, most of the time, squash such vile feelings in themselves (and certainly try to forget them) - but surely we have all experienced them?
And - if we have any insight or capacity to reflect - seen this in other people (including the best people, at times; including those we love the most), and perhaps been at the receiving end of it?
People who cause trouble among groups of friends - break-up friendships, relationships, even marriages; who spread malicious rumours, mislead, misreport, life; who engage in "he said, she said" betrayals.
And surely we have at least thought about doing such things ourselves?
Spite is ignoble, it is despicable - but it is real.
It is found to some degree in almost everybody, and it is the master sin ruling some people (and many demons).
It is seen all through human history, and all around us - yet, spite is hardly acknowledged.
(Except, maybe, in stories about youngish children! Enid Blyton often included spiteful characters, named as such, in her stories - which is how I first put a name to it.)
It is regarded as more sophisticated and pseudo-intelligent to analyse spite in terms of other motivations - especially disguised forms of self-interest. So, the harming of B by A is likely to be described in terms of how harming B benefits A (perhaps indirectly, or over the long-term).
But the point is not whether spite can be explained-away - Of Course it can!
The point is to to Ask The Question. Is this spite?
We absolutely need to know whether whether spite is the real motivator behind behaviour; because if it is, then such behaviour cannot be appeased by fulfilling self-interest.
And, like most sins, spite feeds on its own gratification. When infliction of harm brings gratification, then the infliction of more harm to more targets will probably follow.
Spite cannot be bought-off. Spite will not be satisfied by less than suffering and destruction.
Thus when spite is explained-away - this merely allows for the undetected and more effective deployment of more spite.
And spite is a natural product of the besetting modern sin of resentment - with the dominant ideology of The West being the creation, encouragement, subsidy and protection of ever-more "resentment groups" defined in terms of class, sex, race, sexuality or... whatever*.
And (in the West, the developed world) this is a world of despair (whether actual or incipient). Because nearly everybody lives-by the assumptions that reality has no purpose or meaning, and that human life is followed by annihilation.
With such assumptions; existential despair is normal and rational; such that self-distraction from this (supposed-) reality has become perhaps the primary life goal.
When we have so many people who fundamentally assume themselves to be victims, and who despair; the ground is prepared for the operations of spite - first directed against those who are most resented (i.e. the supposed "oppressors"); but soon (as the sin takes grip) directed against pretty much anyone who in any way irritates us.
When the most spite-dominated people are also among the most powerful, wealthy, high status, and influential in the world - then we have.... Well, we have exactly what we see around us in the world of geopolitics, global strategy, and the international and national leadership class.
A world in which anything that is (or seems to be) of-God, or Good; anything apparently manifesting the transcendental values of Truth, Beauty or Virtue. Anything wholesome, innocent, natural, spontaneous, care-free... Any such becomes a prime target for spitefully-motivated attack.
Yet, up to now, spite is invisible. Trivialized. Explained-away.
By refusing to recognize the operations of spite in ourselves - failing thereby to acknowledge and to repent its sinful nature; we thereby fail to recognize spite in others.
So spite can be everywhere, dominant, and increasing - yet we choose to be self-blinkered against perceiving it.
And until we are aware of spite; the operations of spite cannot be resisted - either in ourselves, or others.
* Leftism now rules the West and much of the world; and Leftism is a negative, oppositional ideology built upon resentment, and depending upon continuing expansion of resentment. The so-called political "Right" (of all types) is merely a variant of Leftism**. This can be seen in its domination by resentments, but of a different inflexion; typically inversions of mainstream Leftism: e.g. resenting women instead of the Leftist resentment of men, resenting the Left-approved races etc. Of course, such motivating resentment is rationalized and explained-away on quasi-objective grounds - yet the actuality of resentment as prime motivator is sometimes revealed when spite-driven desires or fantasies are expressed; as well as by the relentlessly negative and oppositional focus of Rightist discourse (against, against, AGAINST!).
**The only alternative to the Left is religion. All secularism, all atheism, all materialism is ultimately Leftist.
H/T - This was stimulated by a comment from Avro G.