That doesn't explain men from Bosnia-Herzegovina and from the former Yugoslavia, generally speaking. Even Wikipedia [1] mentions that area as being above Nordic countries like Sweden when it comes to average male height.
[1] https://en.wikipedia.org/wiki/Average_human_height_by_countr...
According to this link posted below [1], Montenegro and Albania are in the top 10 for milk consumption per capita.
However it also worth noting that if we go back farther than the past century or so, it was non-european populations that were among the tallest in the world. That would be populations like the Sioux, Athabascans, and Maori. This kind of points to how big a factor social, economic and political context has on population metrics like height. Moreover, certain diets and populations simply make for shorter people. Disentangling all the effects is complicated.
For the data, I'm half-remembering a table from a paper I read years ago. Ourworldindata has a very similar table with pretty reasonable citations, so it checks out:
https://ourworldindata.org/human-height#how-does-environment...
It could also be sexual selection as this stature change is too fast and usually the environment difference takes several hundred generations to show difference.
The timeline is so small I'd argue it's actually free society enabling people to chase their sexual imperitive and this sexual selection is resulting in taller population, not nutrition.