I am no expert, but here's Michael Kulikowski's argument quoted from the wiki page on the debate:

[Heather] is right to try to deduce governing apparatus from the actions that kings and chieftains were able to compel their followers to take. This approach, more than anything, goes some way toward justifying his assertion that a broad class of nonaristocratic "freemen" warriors must have existed in many of the barbarian cultures of the first half of the millennium. Yet to claim the point proved and build further hypotheses upon it is not legitimate; he comes perilously close to recreating the old, volkisch notion of an inherent “Germanic” belief in freedom. Throughout, in fact, Heather makes the tacit assumption that evidence from any “Germanic,” “Celtic,” or “Slavic” group can be used to analyze any other “Germanic,” “Celtic,” or “Slavic” group—in other words, that linguistic identity and socioinstitutional behaviors go inevitably together. [...] a great many historical comparanda would support a model that he ignores — that the Goths were formed from a large number of indigenes and a small number of migrants under the pressure of Roman imperialism, and in the shadow of the Empire.[31]

And more:

Kulikowski charges that old German nationalist and even Nazi influences continue to influence scholarship on the Goths up to the present day, particularly through the theories of Gustav Kossinna.[19] He considers much of what is written about Goths to be "Germanist fantasy" derived from this legacy.

This isn't exactly what I would describe as a debate "blessedly free from nationalist squabbles"

https://en.wikipedia.org/wiki/Origin_of_the_Goths

What if some of the observed racial differences were caused by a lack of vitimin D, due to darker skin photosynthesising less of it? Vitamin D is essential for brain development. Black people in northern climates get less of it than evolution intended. This lack of vitamin D might be causing reduced brain development in black populations. If that is true, we could fix the prison crisis and racial IQ differences with a pill!

Sadly we don’t know because you can’t do the research to test the hypothesis.

If we block all research into a problem then we can’t solve it.

If you actually care about fixing a problem then we should bring all available tools to fix and solve it.

Question: is there any kind of evidence, that hypothetically did show a racial difference, that you would not label as racist?

Having said that, even if the academic outcomes of people with darker skin color were worse (no idea if that is true, or in which country) just knowing that is no proof. It may as well be cultural or even income based (pregnant mothers eating worse quality food for example, or same thing with young children).

Is the question even answerable? What kind of intelligence do we measure with "academic outcomes"? How do we adjust for income and quality of life as a child, things like having both parents, or grandparents? It's an absolute minefield of possible manipulation. Same data can probably be spun to "proove" any hypothesis you have.

Then imagine writing a proposal for such research. What benefits can you predict? If you find there is absolutely no correlation between skin color and academic outcomes after adjusting for all external factors will it convince people that are racist as part of their identity? I doubt it.

Lets say you do prove there is some correlation. What the result of that would be? Open discrimination and vindication of racist views. But even if the principle was true the average doesn't apply to individuals so you can't apply it to any particular person.

This is especially clearly just a racist concept once you realize that none of the studies of IQ vs race actually do any genetic testing, they only rely on phenotype. Which is absurd given the fact that the child of a black-skinned person born in sub-Saharan Africa and a white-skinned person born in a village in Ireland is extremely likely to be black-skinned, but is genetically just as much part of both populations. It's only the history of racism that assigns this child as black more so than white.

I don't find it that tricky, intelligence does come from the brain.

> That's like equating the workings of my bicycle to my decision to ride to a particular place

Both one's brain and one's "intelligence" belong to the same person, like, physically and materially, which is not true when it comes to your bicycle example. More to the point, I find the comparison itself kind of self-describing, it's like deciding to "outsource" intelligence to some other external, non-ethereal entity (like a bicicle that is physically separate from a human being) in order to avoid those hard questions the OP was alluding to (hard questions that oftentimes also involve the political side of things).

Talk about sampling bias lol.

Sure it took many generations but it's hard to imagine that the violence wasn't culturally and racially motivated. Based on genetic evidence it's speculated that that there were more than 10 male migrants to every female coming from the steppe.

> The Yamnaya never made it out of the Ukraine.

I'm not sure what that means? Their descendants clearly did reach Iberia and Britain.