What if the Kalsh people were the last "ancient" greeks?

[lounge60]

The Kalash people are a Dardic indigenous people residing in the Chitral District of Khyber-Pakhtunkhwa province of Pakistan. They speak the Kalasha language, from the Dardic family of the Indo-Iranian branch. They are considered unique among the peoples of Pakistan.They are also considered to be Pakistan's smallest religious community.
They are polytheists and nature plays a highly significant and spiritual role in their daily life. As part of their religious tradition, sacrifices are offered and festivals held to give thanks for the abundant resources of their three valleys.
Kalash mythology and folklore has been compared to that of ancient Greece, but they are much closer to Indo-Iranian (pre-Zoroastrian Vedic) traditions.
The Kalash have fascinated anthropologists due to their unique culture compared to the rest in that region.
the Kalash claim descent from ancient Macedonian soldiers associated with Alexander the Great's invasion of southwest Asia.
However recent examination of DNA shows that the Kalash community has more in common with Siberian hunter-gatherers than Alexander the Great.

But...
What if the Kalash were really descent from hellenistic greeks and their culture and customs were very,very close at ancient greece culture?
We ipotize that in late XXI century the British from India discover this hellenistic people that speaks a greek dialect, live in little greek cities,with temples and theaters and follow for the most ancient customs and owns texts of poets,tragedians,authors lost by long time.
Which reactions in UK and Europe?
The Kalash are protected as last descent of European culturals and spirituals ancestors?

 

[Practical Lobster]

If they were actually descendants of the Greeks then literally everything about history would be changed by the butterfly effect, unfortunately for the scenario. So the UK might well not exist.

 

[lounge60]

How?
Is a little isolated communty of Macedonians and greeks descendants without any contact with the western world for centuries (long before that romans leave Britania).
Exactly as the OTL Kalesh.

 

[Arkenfolm]

Because they'd have contact with the rest of the world, and from there, butterfly effect.

I also highly doubt they'd hold onto a culture that Hellenistic. Most likely a bunch of peasants following something vaguely recognisable as Greek polytheism, speaking in a language that could be identified as a Greek-derived language that would be mutually unintelligible with any other form of Greek ancient or modern. And definitely no Greek texts, they'd have burnt those for fuel ages ago or otherwise misplaced them since none of them could read, much less in Ancient Greek.

However, if you have it so the Greek language goes extinct (gets replaced by Latin or something), they'd be exceptionally interesting from a linguistic standpoint, since they'd be the only living example of the Greek branch of the Indo-European languages.

Expect lots of crackpot theories about them ITTL.