You're right, but ydna helps to understand our origins, especially on this thread. If we find an ancient skeleton from Mycenae which belongs to J2a1, than it is clear that certain nationalistic Albanian views on Pellasgians would finally mitigate. That's clear that G2a and J2a1 is found in greeks and not in Albanians. This makes sense.
Which is the true original proto Mycenean ydna according to you?
We "have" yDna from Mycenaean tombs. We're discussing the paper which published some, yes?
I don't decide which yDna is the "true, original, proto Mycenaean, ydna". I let the ancient dna tell me, and a final conclusion waits upon a larger selection of samples.
If they came through the Caucasus and entered by a path which took them around the Black Sea, about which the authors of the paper are agnostic, J2a might very well turn out to be the proto-ydna. It perhaps more likely came by way of the northern Balkans and so carried an upstream R1b or R1a clade. Those clades are very minor ones in Greece today.
I don't get this mania about which was the "first" one, as other than a matter of intellectual interest. By the time their civilization was thriving, J2a was prominent among them, and not just among serfs if that's what you're implying.
As for the "Illyrians", the only data we have so far, and we have a few samples, shows that autosomally they're more related to other ethnicities than to Albanians.
I also don't get this point some some Albanian members are making that Greeks are so much more "southern" than they are. They're not, not if you're talking about mainland Greeks. It sometimes seems as if Albanians think they're not a Southern European ethnicity.
Part of the reason these discussions often degenerate into chaos is because Albanians are not included in papers or gedmatch because there's no academic sample of them. However, I'm sure lots of Albanians have tested and gone on gedmatch. We have results on spreadsheets for the various Greek populations. Publish your results in a side by side comparison with, say, Dodecad v3, and we'll see how you compare. It's simple enough.
Nationalist views propagated by authoritarian rulers from before the age of ancient ydna are bound to be wrong. "Pelasgian" is an outmoded, unscientific term. Who knows what the ancient authors meant by it? If you or "Albanian Nationalists" define Pelasgians as the Neolithic farming populations of Europe, including the Balkans, their most predominant yDna would have been G2a and I2a. Whether Albanians TODAY carry either specific clade is irrelevant to the fact that I'm sure they, like everyone else in the Balkans, is descended from those G2a and I2a carrying men.