i don’t get it either. The fascination with Indo European’s.
When I first learned about the IE languages and their common origin, I was awed by how widespread the family was, how all these languages were originally one, it fascinates me to this very moment.
I know and it saddens me that such an interesting topic was hijacked by the Nazis and their modern leftovers, their fantasies were built on old disproven pseudoscience, and it should be viewed as such.
I think it's normal to be fascinated with a language family, whether alive or extinct, it tells a story, a story of the migration of peoples, it tells history. Another interest of mine is the Afro-Asiatic languages, combining linguistic and genetic evidence it seems likely that Afro-Asiatic originated in the Natufian culture and was spread to Africa by Levantine farmers, Ancient Egyptians, Cushites, Chads, Berbers, Semites and probably other extinct cultures were all descended from one linguistic community that lived in the early Neolithic villages of the ancient Levant, it is quite mythical really.
Indo-European society was probably divided into three classes of Priests, Warrior Nobles, and Commoners. When an IE speaking tribe would "collide" with another group, and somehow assimilate them, their social pyramids also "combine", meaning that not all the newcomers are going to be warriors and not all the indigenous are going to be commoners, remember that the Mycenaean noble didn't differ much from the commoners, and J2a was also found among them, and the major ancestral component was Anatolian Neolithic, which means they intermarried with the population before them.
They are an interesting group.