But we also have a very skewed version of what the personal life of someone like Hitler was like. Hitler wasn't boiling babies for breakfast or anything like that, there's this idea that no matter how horrid and vile something is, Hitler would be there quietly tucking into his liverwurst while it's going on in the background. That couldn't be less true. The high-up Nazis kept all the unpleasant stuff far far away from themselves and their loved ones. It's easier to lie when you demand not to be told the details.
It's no different to e.g. a CEO who oversees a company who are e.g. torturing and murdering Amazonian indians over logging and mining disputes. Almost all CEOs and dictators keep their own hands clean, and keep their immediate families well away from anything unpleasant, no matter how vile the things done in the name of the organization (bloodthirsty lunatics like Idi Amin are the exception not the rule). You can bet that Hitler didn't know many of the operational specifics of the Final Solution, because he had enough power to choose to not be told exactly what was going on. There's a reason that the death camps were mostly in Poland, not Germany, and that's because most of the Nazis leaders didn't want that stuff happening anywhere near them.
Also similar in phenomena as to the hedge fund manager who successfully exploits market futures to immensely enrich themselves and their clients; oblivious to the consequences for those whose livelihoods rely upon the commodities being traded. In the past, men who knew nothing of wheat and corn, its farming, transporting or selling would push prices up and down, making peasants starve or farmers go out of business. Today men who know nothing of minerals and energy, its procurement, transporting or uses, push prices up and down, with too many consequences to list whilst drunk.
I find the commercial variety of this phenomena more interesting than those done by military leaders. For those, even Hitler, I believe military leaders have a much easier time accepting the total destruction of their enemy, including civilian targets. Carthage must be destroyed; such sentiments displayed by the Soviets and Nazis was displayed for example in allied strategic bombing of Germany or fire bombing of Japan - amongst the high commands of all major powers, it was exceedingly easy to view the eradication of the enemy's fighting strength in totality as the objective, and the civilian body a viable target to achieving that objective. The most interesting examples to me are the great nomadic conquerors. For while the Imperialists of China and Europe had many petty governors willing to eradicate to expand, few forces have been so able to wipe out entire civilizations as the nomadic conquerors - one regrets that no one was brave enough to ask Genghis Khan if he regretted all the death he ordered, oversaw, and personally participated in. Very much not a backseat participant to the slaughter.
Commercial leaders however? It's a little bit of "Thank you for smoking." If you are fully aware that your decisions will be the ruin of others for your gain,
it may be perhaps unsurprising that those in the top are people who self-select or must develop for the traits which make successful CEOs. Thus, all the positive traits that make good leaders, coupled with a low empathy for others.
"operational specifics" known by a top-level leader would probably just be numbers, locations and transport routes. specifics of how people are treated are not the types of details that make their way up to the head of the army. The top-level of any organization only gets brief summaries at best.
To add more detail, how people treated was passed on to higher ups, specifically Himmler, but I don't know if Hitler was given or interested in receiving reports about the manner of deaths in execution camps beyond the numbers, efficiency, materiel costs, and certainly before the late stages of the war, whether they died from forced labour, disease or execution. That said, just because the reports might not bother to include such details, does not mean Hitler would have been ignorant of them. The officers who witnessed or conducted the various roundings up, executions and operations of the death camps talked about their experiences with their colleagues and superiors, and I doubt that this word of mouth failed to reach Hitler
*EDIT
Also, while this may not apply to state organized genocide, in many cases the testing of new weapons or strategies intended to wipe out whole towns and cities, the higher ups were interested in knowing the details of what they had inflicted
This is a bit silly to be arguing about, I've had enough to drink to get stupidly invested in it, and it isn't really germane to the thread or your overall point. Best to drop it.
tbh drunk history is bretty dank