Haplogroup I2 in Balkans , Paleobalkanic or Slavic ??? POLL

[Bosniensis]

Dude, land of proto-Slavs is Polesia (Belarus), not Poland. I2a1b in Polesia is 25%.
I2a1b exist in Poland - about 6%.

Where are the sources about Illyrian and Thracian migrations to Ukraine, Belarus and Russia?

Migrations of Illyrians and Thracians from the Balkans towards to eastern Europe are not recorded in any historical sources.

Lol man, not even Illyrians themselves are recorded correctly in any historical sources.

But Greeks confirmed that both Illyrians and Thracians (how Hellenes called them) PREDATE Hellenes.

Why would Greeks or Romans create a note about Illyrian conquest of Ukraine since they called them "Barbarians" all the way up to Hellenization.

That doesn't mean it didn't happen, it's just not recorded.