The term Indo-European language group does not mean the European languages came from India but rather that they all seem to have a common origin.
Sanskrit is the "common origin".
I'm just a rank amateur, just an observer of men, but I notice white people like me are called Caucasians. Further, I notice that people in places like Afghanistan, though muslim, may be blond, and some have blue eyes. I also notice that the people from the Hindus Valley (India, think Hindu, Hindus, Indus, India) are very dark skin, but their features look like mine.
So, I thought my people came from South Asia. Is this article refuting that? I couldn't really tell. They also seem to project a lot of things bassed on this so-called mitochondrial DNA. Is it accurate? Are they peeing on my leg and telling me it's raining?