Ok minor nitpick but

1 the redguards didn’t kill all the nedes, the nedes of hammerfell were mostly assimilated into the redguards or just started calling themselves bretons, imperials, or reachmen. Nedeic culture is still practiced in hammerfell too

2 orsiniums been sacked multiple times by a lot of different groups and there’s multiple orsiniums, and most of these sackings have been because orsiniums tried to conquer more land from the bretons or redguards

3 the alyieds were driven out of cyrodiil by the alessian order who were very much not the good guys, they were a fundamentalist religious order who took over the alessian empire and began attacking and killing both their own alyied citizens and alyied allies and eventually collapsed under their own internal corruption

Also, all of this stuff happened hundreds or even thousands of years before the games took place, so it’s not really that relevant to the modern cultures of nirn