It's seriously insane how hard people are working to misinterpret you, there's no way people other than op are approaching this in good faith. You made it clear you're not a tankie, these people just can't stand the idea that their beliefs require proof or that there are people who aren't swayed by rhetoric alone (edit I def thought this was a tankie comment at first, that's how it sounded at first but you've made it abundantly clear that's not what it is)
"You're trying to prove a negative, they should just realize that" "they should just" is a pointless take to have on anything. people will never "just", they need convincing, and different people are convinced by different things. It's a tough subject to research, you've got one side claiming they're all nazis that deserve to be conquered and another that thinks they're all saints and can do no wrong, and I don't blame people at all for wanting evidence that the very real nazi groups in Ukraine aren't representative of everyone there, or even the whole military