Smart alec.
As of now, the accepted academic version, which
@levina is fighting so hard, is that a common horde of Indo-Iranian speakers split apart - timing and speed and seriousness of the speed not known - in a region which could be where the graphic shown earlier indicates, northern Iran, somewhere near the Caspian, or around the Syr Daria/ Amu Daria delta. They may have been moving west to east, as the graphic suggests, throwing out a peculiar off-shoot into the Takla Makan, the Tukharians, or north-north-east, from the BMAC culture location, to south-south-west, through Balkh and onwards to the Iranian plateau.
The split seems to have been religious in nature, as the roles of gods and Titans are reversed on each side of the split.
The minority faction moved across the mountain barriers, either to the north, or to the south, through the Bolan, in dribs and drabs, replicated their tribal nature as they recovered for a few generations in the Indus Valley, and moved into the Gangetic plain by about 1500 BC.
This is reflected in genetic terms, as there was a giant churning of ANI and ASI at that time, for a protracted period. It is tempting to see this perturbation as reflecting the increasing spread of the Indo-Aryan language over the Gangetic Plain, and physical distancing of the older elites speaking Dravidian from the scene of the linguistic take-over.
We came from you.