You're way off topic but I will give properly what I think about points you discuss about, because you took some time to write this down.
First of all, I'm not sure if that what I say is the absolute true. I'm just giving my view of point as a West Asian-centric fella. But I truly believe in in this concept for a couple of years now!
As far as I know the Hittites were the newcomers in West Asia. Before them the proto Kurdish languages (call it proto-Indo-Iranian, call it proto-Iranic (Aryan), I call it Irano-Hurrian) were already spoken in Kurdistan. Proto-Kurds like Mitanni (northwest) & Kassites (southeast) in the east already formed a counterbalance of power in West Asia. Those Mitanni & Kassites were according to me in the majority J2 & G2 and in the minority R1a folks.
There's a lot J2 and other West Asian DNA in Central Asia. It mixed with the natives and steppe folks from above the Caspian Sea.
According to me Irano-Hurrians (other call them proto-Indo-Iranians) who lived a semi-nomadic way of life moved to the Central Asia and took the Irano-Hurrian language with them. Central Asians mixed with the newcomers from Kurdistan and became known as the East-Iranic peoples.
Later these East-Iranic tribes (with a lot J2a but also R1a & R2a) went to the west again, but now also to the Pontic-Caspian Steppe. They became known as Scythians, Parthians etc. Later there was also a back migration of these East-Iranic peoples from the Steppes into Kurdistan.
And yes, like you, I truly believe that the first proto-Indo-Iranians, proto-Iranics (Aryans) or Irano-Hurrians were mostly the J2a & G2 folks from West Asia!
That is a possible theory,
that find agree in some Circles in Greece, IE as J2 language and from them to R1a of Siberia and r1b of Europe,
I just mention it as a possible theory,
All 3 theories, as you read in my post have a missing link,
if J2 is Ie that means is clear a minor Asian, Aegean, Pontic, Language but much before Chalkolithic era probably far to early neolitic or even paleolithic eras,
The think you do not understand or know is that Greco-Aryan was not Satem (Iranian) neither Centum (Greek) but the spliting era language,
after the Indo - (proto-Zoroasters) enter we have
Indo-Iranian (Satemization),
according that Theory (J2) the IE were minor Asians that spread to west (pre-myceneans, pre-Celtic) and East (Scyhtians, India)
From India we have devastations to Iran that makes Satemization of Language to Indo-Iranian while Scythian moved North of Black Sea to Europe creating Germans and Slavic,
That Thoery lacks in Gennetic that J2 should leave tracks behind it if was connected with R1a of Scythians, But we find only Trucks of R1a
the other Theory of R1b lacks in case of Basquez,
while the R1a lacks in case of Caucasos Balkars,
so a clear primary HG of IE is not certain,
that brings back to the begin,
So where was PIE spoken, and where was primary land,
that gives 2 areas,
1) The south Black Sea mountains of Pontus, The Colchis (Lazistan) and Georgia,
we know that Hettits enter from Georgia to Lazistan to North Minor Asia (Pontus) etc,
2) is the Samara open fields of Scythian R1a horse riders (N east Caucas)
An alternative solution that Lacks of Evidence is the Ugarit case, but until now only few support it, the case of Yehunda work,
other non proven or proposed theories that are created mainly for Nationalistic or pride reason are
IE is nothing more than an Indian language that spread North and West, (PIE starts from India)
IE is a Greek Language that change according the tribes that assimilated (PIE = Proto Greek)
IE is nothing more than a Slavic-Scythian language (PanSlavism)
IE is a German-Iranian Language (well known circles theory)
All the above are fabricated cases that contain only a small % of truth
now about the R1b
the R1b L-40 that exists in Greece is considered Hettit meaning that indeed Hettits moved West,
well in another post I said something,
Sar-Deis
Sur-di (Ancient Makedonia even today the prefix exist)
Kuretes etc
All seems to be to have a connection,
i have told you that Colchis was Land of Medea (Argonauts), which later we read in Text moved to minor Asia from Greece to Find the Aryans who spoke Colchian !!!!
if you realize that, then we might have a good Starting point,
