Different Europeans are all of the same race, but there are some broad categories of Europeans that get more specific than that, little sub-groups, like Northern Europeans, Alpine, and Southern Europeans. There are various sub-races of the sub-Saharan black African race as well, but they're all black Africans.
Obssessing on racial purity can get to a level where it's ridiculous beyond a few generations (although I would not consider someone who was 1/4 black to be white, someone who was 1/32 and self-identified as white would probably be white) and obssessing on sub-race purity gets ridiculous much more quickly.
I don't care so much about keeping every sub-race "pure" but I do think they should continue to exist if possible. I'm not upset by one white marrying another type of white though. My pride is that of a white person, and I'm proud of my European heritage. All areas of Europe and all groups of native white Europeans have created wonderful things and innovated wonderful things and they're all of the same basic race.