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.
Maybe there is something to it but the uk for example has really low immigration and where i libe now in sweden, like one fourth of the population is recently immigrated people and even the immigrants are taller than youd expect tho there is a lot of mixing between people. I also think the immigration from for example the balkans could have actually pushed the average height up because croatians, serbians and even more so bosnians are tall af.