Sintashta is located in Kazakhstan. By ancient Kazakh Z93 I mean Andronovo, Sintashta horizon. R1a in Sintashta, modern day Kazakhstan was Z93 and not Z283. What I'm saying is that Z93 was already present in Kazakhstan even before Sintashta. It is even mentioned on eupedia page of r1a:I cannot see any logical reason for coming to such a definitive conclusion.
The link between ancient North Ukraine and Sintashta per se is clear. A Ukrainian sample from the early 4th millennium BC is indistinguishable autosomally from Sintashta samples, despite both having major differences to samples from other parts of the Steppe, Middle East and Central Asia.
I think this has been asked before - what is this ancient Kazakh Z93 sample to which you refer? I would be grateful if you would supply details.
Where is evidence that Mitanni were from Sintashta? Who is saying that Mitanni came from Sintashta? If Mitanni had R1a it was most probably Z94. Very different from CWC and 'northern Ukraine'. But Mitanni 'Aryans' had also different dna like maybe J2a and R1b and they were very different from Sintashta, let alone CWC. They didn't find Z94 in BMAC, but they found J2a. If part of Mitanni came from central asia, it was most likely bmac and even part of J2a in Mitanni could be also from bmac.A third possibility is that R1a tribes split in two around Kazakhstan during the Late Paleolithic, with one group moving to eastern Europe, while the other moved south to Iran.
https://www.eupedia.com/europe/Haplogroup_R1a_Y-DNA.shtml
Steppes people from ancient Northern Ukraine to ancient Kazakhstan were autosomally similar to each other but not identical. Some of them had more Uralic dna, some of them had more CHG/Iran_N dna in them. They just lived there next to each without any serious boundaries and were native to that region. The Steppes were just like a highway without boundaries.
Mitanni 'Aryans' were very different from what you do imagine. They were Middle Eastern people at the first place.
Middle Eastern Levite Jews were religiously influenced by other Middle Eastern people. What is the big deal about it?
So, there are to much assumption. We don't know what happened for sure. But Levite Judaism was influenced by Mesopotamian Hurrians & Mitanni and by later Persians. Nothing to do with CWC or Sintashta. Just Middle Easterns influence other Middle Easterns