Alt text: Chart showing average height, but incorrectly scales the entire person instead of just the height, with the Netherlands as the tallest and Indonesians as the shortest. Bottom image is the Bane vs. Pink guy meme showing Bane as the Dutch and Pink guy as the Indonesians.
That makes sense but if you isolate it down to only the immigrant populations that data lends itself to the theory of ethnic background, or really genetic background, being a better indicator.
The Netherlands has an immigrant population of about 4.8 million out of ~17.8 while the US has about 53.3 million out of ~340.1 million and that’s only counting foreign born.
In the end, I still speculate that ethnic/genetic background is a better indicator than country as this graph shows.
Anecdotally, I’m an American male who is 6’ 1" and my ancestral ethnicity is mostly German with a bit of Swiss. Growing up my friends were the same, mostly having German or Scandinavian ancestry, and I was the short one in the friend group. My friends all ranged from 6’ 2" up to 6’ 9".