Depends on the circumstances but yes, intent is what matters the most, it's just harder to see than actions. It's important to double check the info before you go around murdering innocents, lol. But I assume many of these just wanted the money that came with it and said "fuck morals, fuck relevant information". The Americans who signed up to kill brown people in the Middle East in the early 00s fall into this category, for example. Would they be exempted? Of course not, they like everyone else had the duty to act right, and they like everyone else knew murder was wrong (in the information era who can claim ignorance when it comes to the guidance of the prophets? Everything is freely available online, you either care or you don't) and they still went ahead for whatever reason. Should've double checked! But they weren't too stupid to get it, just intellectually lazy and overall uncaring, and disregarding that responsibility and then committing atrocities is enough to land you in Hell, especially if you never repent. Will the leaders have a harsher sentence? Definitely.
Again, you keep on mentioning viewpoints but you still haven't provided a single one you stand by that I don't and that directly contradicts the TC (whilst also being morally right, ofc, I doubt you want to pronounce yourself a villain). You yourself agree with them besides the ones that involve the Creator... And how could I interpret 1 as 0 unless I'm just blind and my opinion should be disregarded? How could I interpret "don't kill" as "kill if they're brown/if they have things you like/if you feel like it"? How can anyone? Which interpretation of the TC can give you something that goes squarely against the literal meanings of these phrases ?
I really don't know what you're saying and I'm not feigning ignorance, I think you just have a fundamental misunderstanding of people and reality. You believe in gravity (and something in your tummy feels funny when you look from a balcony on the 12th floor), I believe in God, His judgement, the moral duty He has imposed on us and Heaven and Hell as our final destinations (and I also feel something when I transgress, everyone does at the beginning, then they either learn to pay attention to it or ignore it). And just like you wouldn't jump out of a building unless you lost your mind because you would end up flattened, so would I and everyone on my side not commit great transgressions because we know what will happen. Perhaps you have a moment of insanity, idk, for whatever biological reason something in your brain just malfunctions... well, as soon as you come down from it you'd greatly repent your actions, make amends, seek solutions for this insanity, maybe even get yourself locked up so you don't do it again! But, again, most people don't just randomly murder or rape when their whole lives they didn't even punch anyone. And those who do and claim to believe in something that disagrees with it, like the TC, are simply lying about their beliefs. They have and they will continue doing it because some people are just too dumb to realize it and they have no morals so it's completely win-win for them.