Spot-on. Let me illustrate this with an example.

Take Narasimhan, Reich et al.'s paper titled "The Genomic Formation of South and Central Asia". It suffers from a number of glaring issues. https://twitter.com/ProfVemsani/status/1322339830819393542

The study is based on ancient DNA from 612 individuals from various regions and periods: Iran, Turkmenistan, Uzbekistan and Tajikistan, the Steppe east of the Ural Mountains, including Kazakhstan, and the Swat valley (Indian subcontinent).

The study determines a total of three ancient individuals from Turkmenistan and Iran to be “Harappan migrants”, despite not having access to any actual Harappan DNA for making a genuine comparison.

The study deems these 3 individuals to represent an “Indus periphery” population without having access to any actual Harappan DNA.

Since the study does not have access to any actual Harappan DNA for making a genuine comparison, these three foreign DNA samples from Turkmenistan and Iran are made to “stand in” as “proxies” for the entire Harappan population itself!

This is the very definition of a circular argument.

The Harappan civilization had a population of over 5 million people at its peak. It is absurd to arrive at sweeping conclusions about its genetic make-up based on three dubious foreign DNA samples.

Nevertheless, that is precisely what the study does.

Further, the study makes another arbitrary and dubious assumption: it assumes the Onge tribes-people who inhabit the Little Andaman Island to be representative of what it calls the “Ancient Ancestral South Indians (AASI)”.

It is well-known that the Andamanese people have been cut-off from the rest of humanity for tens of 1000s of years. Any genetic affinity or kinship they may have with other groups can only be distant and tenuous at best.

This is just one example of a problematic research paper. There are innumerable research papers from the field of genetics that make the dubious claim of being able to associate language (and culture) with DNA.

The "Aryan Invasion" hypothesis became untenable decades ago in the 20th century itself, when it became clear there's no archeological evidence of an invasion.

To keep the theory alive, they substituted "Invasion" with "Migration", but the central claim remains the same: to portray Hinduism and Sanskrit as being foreign to India.

Since the "Aryan Migration" claim too is untenable, with no data points to support it, I expect them to propose an "Aryan Tourism" theory very soon.

It's high time for this neo-colonial enterprise to be put to rest.