It totally excuses it. Intent is key. If you have no clue what a disease, a virus, an immune system are I don't see how you can be called "heinous" for unknow

It totally excuses it. Intent is key. If you have no clue what a disease, a virus, an immune system are I don't see how you can be called "heinous" for unknowingly and unwillingly spread diseases. As for lands, I don't know, lands all over the world have been changing hands since human beings learnt how to walk, most of the time after violence/war. It happened in 1500 when the concept of "nation" didn't even exist and the only way to say that a land was yours was to be able to keep it.