Yes, that's the problem. This tweet is plain as day in the context of his other writings. His theory states that groups of people born of different "climate" are "more beautiful and all ways better disposed." (p 67)
This tweet is part of the same idea. His theory takes this idea to the concept of a "peculiar love for the people of own race and country". He attempts to obfuscate "ethnicity" to be about culture, but connects it to the "blood ties in ethno-genesis". It's all in the book, folks.
Chapter 3 of the book covers most of these things. By the end I am certain that most will conclude that Wolfe's theory is distinctly ethno-nationalist.
Since @CalebDixonSmith (he blocked me) says I'm being dishonest, allow me to provide more evidence. Let's start with this tweet from Wolfe, which I suspect he deleted while his account was private yesterday. Archive:
My rebuttal of your article will include things like your explicit use of "no enemies to the right" to dismiss race hatred and your "glowing" review of el Caudillo.
I ask for patience as I finish rebutting Wolfe's book. I promise I will give you an intellectually honest rebuttal
Cursory read and this stood out. Interested in your reasoning, as it will help my rebuttal. Is this not projection/hypocrisy, since your entire phrase is based on only attacking one side? I think a conservative Christian faces far more social backlash attacking the right nowadays