Everyone knows:
Wikipedia (it is good to remind ourselves)
Y-DNA Haplogroup I-M170 is predominantly a European haplogroup and it is considered as the only native European Haplogroup.
I (I1, I2) carriers = Old Europeans
The TMRCA (time to most recent common ancestor) for the I clade was estimated by Karafet and colleagues in 2008 as
22.2 k.a. (22,200 years ago) with a confidence interval between 15.3-30.0 ka., placing the Haplogroup I-M170 founding event approximately contemporaneous with the
Last Glacial Maximum (LGM) which lasted from 26.5 ka to 19 or 20 ka.
It would seem to be that different episodes of populace movement had impacted Southeast Europe, as well as
the role of the Balkans as a long-standing corridor to Europe from Southwestern Asia is shown by the phylogenetic unification of Hgs I and J by the basal M429 mutation. This proof of common ancestry suggests that
ancestral Hgs IJ-M429* probably would have entered Europe through the Balkan track sometime before the LGM.
...
Haplogroup I is native to the Balkans. I carriers moved by the whole Europe.
Someone can ask what happened to the older clades, maternal to I2a Din, that inhabited the Balkans and the rest of Europe?
They are gone, no one knows why.
I2a Din, and I1 of course, and fewer I2 clades, are survivors. It is blessing, fortunate for humanity.
Once, I1 and I2 carriers inhabited the whole of Europe. Everyone can reads scientific studies and research's data.
With all due respect for you as an Albanian, we can agree that nobody can deny the contribution of the carriers haplogroups I (I1 and I2) to the development of Europe.
Maciamo in Eupedia created wonderful pictures. Here is one for Europe 6000-5000 BCE:
You can see, in every European culture in this time I carriers gave contribution.