Are Most Indians Relatives of Foreign Invaders?

It was claimed by foreigners that indians are descendants of white skinned foreign invaders, who men from eastern europe arians. Then later it became very clear there is absolutely zero archaeological evidence of any invasion whatever. Su then the story was changed, and they said it was not an invasion, it was a migration. They imposed their foreign language, sanscrit, foreign culture and religion, hinduism and the evil cast system on the hapless native bravidians,. So that is the migration claim. Now, there's e the amnia story, the amnia angle as well.