...Eh? Those aren't mutually exclusive. Southeast Europe is largely Slavic speaking, and I2a-Din is higher in Slavic-speaking areas of Southeast Europe (for example, its frequency dips in Albania and Greece).
I suppose you're trying to argue that I2a-Din is not as common in the Slavic countries without Illyrian influence. But it's really not so much of a dip that it invalidates a Slavic connection to it: 21% in Ukraine, 18% in Belarus, 11% in Russia, 9% in Poland (including out members of the haplotype most common in the Balkans), etc. These are not particularly Illyrian places, but quite Slavic.
This, of course, leads to the question: Why do West Slavs and East Slavs have lower I2a-Din : R1a ratios than South Slavs? To me, the obvious answer is regional differences that were amplified during expansion. We also see regional differences among different Germanic peoples, and among different Celtic peoples, so why not among different Slavic peoples?
I've repeated this line of argument several times now, although I can forgive you if you don't have time to read through this whole thread. :embarassed:
I agree that there is no obvious connection between I2a-Din and Corded Ware culture, other than that its initial launching point was once within Corded Ware culture. But as I just said, the Balto-Slavs were likely R1a dominant, and I suspect that the drift (or amplification) of I2a-Din within their population happened after (or as) they differentiated into Balts and Slavs. So this line of argument doesn't contradict me.
This doesn't contradict me either.
Then why do the 2 currently known subclades of I2a1b to have existed around that time not converge on Eastern Europe? One has its highest diversity in Western and Central Europe (with an interesting outlier in Iraq), and the other is evenly split between Western and Eastern Europe. If anything is clear about I2a1b, it's that we can't pin it down yet. Eastern Europe seems like far from a safe assumption at this point, much less speculating that it "dominated all of eastern Europe except Russia."
So they need to start from conclusions about how haplogroups map to ancient cultures, then work backwards to come up with dates, and, uh... ignore STR and SNP dating converging to give a young age for I1? :confused2:
What about STR and SNP dating makes you think they're so inaccurate? Just that they don't match the conclusions you've already made about I1?
Because I1 and Scandinavia were both in the equation during the Germanic ethnogenesis.
They don't have different subclades entirely, at least of the common higher-level subclades, just different frequencies of the same ones. This is due to normal regional variance patterns that you get with every haplogroup.
Having many subclades all expanding around the same time is evidence for rapid expansion out of a bottleneck. I would suggest its drift into, and expansion via, the early Germanic peoples is the main culprit.