Mao killed tens of million of his own people because of his misconceptions about farming, economics, and ecology.
Hitler killed millions because of his misconceptions about jews.
9/11 was executed becuase of a small group that were very confused about the basic facts of reality ("god").
There is only delusion + power + conviction. There is no other evil.
I think the missing ingredient is simply not caring about the outcome. It could be because they don't have empathy (sociopaths), or that the society has trained them into normalising obedience to the cause (facsism / communism) or inhumanized their targets (consentration camps).
Acts can certainly be described as "evil", but I don't agree that "evil" is some type of force that affects people.
To go back to my original point, the simplistic equation falls apart if you spend a second looking for counter examples.
Sikhs give free food to any who asks, without expecting anything in return. They are deluded (they do to it please god), and need power and conviction to do so.
If you believe this, your beliefs are out of step with essentially every Western justice system, which hold murder to be a worse crime than manslaughter. The difference between them is solely the intention.
(I still think it's a bad example even presented like this, and I disagree with GP, but your example seemed wrong)
By "conviction", I understood them to mean a kind of blindness -- an unshakeable belief that what you are doing is right, regardless of what others may believe. That kind of conviction is orthogonal to intention to harm another person. I took the entire thrust of their argument to be that intention to harm another person is neither necessary nor morally important for evil. But that is not how most of the West sees it (as evidenced by the distinction between murder and manslaughter that I pointed out).
If, when they wrote "conviction", they in fact meant "intention to harm another person", then I agree with them. But in that case I'm not sure why they posted their comment at all, since that (namely, the thesis that intention to harm is morally important when actions cause harm) is already the accepted norm, at least in the West.
Manslaughter is when you kill someone without conviction and/or delusion. You can hit someone without the conviction that you need to kill them and they fall really badly and die.
Murder. You can hit someone in self defense where you have no conviction that the person must be killed (because for example they say you had sex with their wife, but you in fact know you didn't, it's a misunderstanding), and you don't have any delusion (you know the attacker is delusional in fact). And then you defend yourself and he dies because he hit his head badly on the way down.
Because that is the only way I can interpret your examples so that they correspond with the legal distinction, which is based on intent to harm and TTBOMK never mentions "conviction". If so, we're in full agreement, since that is already the accepted Western norm and my original comment was based on a misunderstanding, and unnecessary.
But also if so: I'm puzzled why you chose to swap the natural and original word "intent" for a different word ("conviction") that is easily misinterpreted as a quality orthogonal to intention to harm, and about which an interesting but fundamentally wrong argument is periodically made (namely, that it, plus power are sufficient for evil, without any need for intent). I'm also puzzled why you made the initial comment I replied to at all, since it's then a defence of the absolutely uncontroversial status quo. It's like posting that you believe in gravity.
They also were under the delusion that the US was a democracy, and hence the general population could be held responsible for the actions of its leaders. Understandable if they had mainly been exposed to US/Occidental state propaganda.
Today I don't think anyone would be inclined to hold such a belief.
Or maybe the Gelatin art crew?