to be fair, the israeli palestine conflict is significantly longer running than anything that the germans managed, and so far, hasn't killed 6 million people, so there's that.

Part of the problem is that it's really really difficult to see the magnitude of the issue until the dust has settled, part of the reason we know how many people died in the holocaust is due to the work of various jewish archivists/historians that have spent decades crawling through information trying to piece together what they can, paired with the reasonably meticulous documentation that the germans were known for. (though i can't confirm that one)

Up until we practically landed boots IN germany, we didn't really have any idea what was going on, that's part of why it took so long for anything to be done.

Thankfully it's 2024 and we have modern technology, so you can't exactly just "hide" things like genocide anymore, it's a lot more apparent.