The Aryans were a real people they were not invented by the NAZIs. They lived on the steppes long before the Germans ever reached northern Europe. They invaded south Asia a couple thousand years before Christ and I don’t think they were the first invaders from the steppes. But I don’t think any of them had blond hair and blue eyes. It would seem that if they ever had those characteristic they would be more visible in the current population of the region. The NAZIs were good at distorting facts to fit their propaganda.