The Swastika may be an Indian symbol but the Indo-Aryans did not originate in India. There is a lot of historical evidence that Indo-Aryans originated as a steppe culture in Central Asia around the neolithic to early bronze period and then spread to Europe and East Asia. This is also why the structure of so many Indo-European languages is similar; they all have a common ancestor in the Proto-Indo-European language.
It is quite a simple symbol to draw, so different cultures have probably came up to it independently.
Iirc, their theory was that the Aryan race originates in India and the swastika is an Aryan symbol.
The Swastika may be an Indian symbol but the Indo-Aryans did not originate in India. There is a lot of historical evidence that Indo-Aryans originated as a steppe culture in Central Asia around the neolithic to early bronze period and then spread to Europe and East Asia. This is also why the structure of so many Indo-European languages is similar; they all have a common ancestor in the Proto-Indo-European language.
Possibly! It may very well predate the Vedas as a symbol of auspiciousness.