>And there are Burgers here who unironically think people with brown eyes aren't white
Of course one can have brown eyes and still be white. There are different branches of the white race. The nordic branch generally has blue/green eyes though. If you are tall, fair skinned, have a long skull, a straight nose, brown-red-blonde hair, yet have brown eyes, you can still be largely nordic.
""The first is the Nordic or Baltic subspecies. This race is long skulled, very tall, fair skinned, with blond or brown (or red) hair and light colored eyes. The Nordics inhabit the countries around the North and Baltic Seas, and include not only the great Scandinavian and Teutonic groups, but also other early peoples who first appear in southern Europe and in Asia as representatives of Aryan language and culture.
Eye color is of very great importance in race determination, because all blue, gray, or green eyes in the world to-day came originally from the same source, namely, the Nordic race of northern Europe. This light colored eye has appeared nowhere else on earth, and is a specialization of this subspecies of man only, and is consequently one of extreme value in the classification of European races. Dark colored eyes are all but universal among wild mammals, and entirely so among the primates, man's nearest relatives.
“One subspecies of man, and one alone, specialized in light colored eyes. This same subspecies also evolved light or blond hair, a character far less deeply rooted than eye color, as blond children tend to grow darker with advancing years, and populations largely of Nordic extraction, such as those of Lombardy, upon admixture with darker races, lose their blond hair more readily than their light colored eyes."
Madison Grant- The Passing of the Great Race