Prove to me why the Nazis didn't hate Slavs

Slav lands have pure Aryans too, they suffered degradation at different times than the West, you can find the same 'White' untermensche in East and West today.
Haplogroup maps are divisive and innacurate to tear Europeans apart. If a man and woman are from the same blood, look similar, yet come from a different country doesn't make it race mixing, unless one partner has slight worse or mixed features than the other it's not as ideal. Though marriage is best when balancing relatedness as well, healthiest children are like 4th cousin distance, between outbreeding and inbreeding. Too similar and too far is damaging, while too far across races is destruction.