It actually does.
If you’ll bear with me and work with the assumption that I am not in fact a white supremacy appologist…
[T]he White community is so entitled because, for the time being, it is the advanced race.
He is not claiming inherent superiority of whites here. He is, instead, pointing out that in the US at the time, whites were more advanced. Not so much superior, as simply better off. Indeed, I believe he himself once pointed out that the NAACP implies this in its very name. It’s for the ADVANCEMENT of colored people. Because, prior to the civil rights movement, due to the history of the US, blacks were disadvantaged.
I do not feel that this is, in itself, an offensive notion.
Likewise, the second quote has a similar underlying concept.
I think that it’s easy to draw a parallel with the language used by white supremacists, but it’s important to note the key difference. The white supremacists are talking about an innate superiority derived from their race, while Buckley is talking about a temporary superiority as a direct result of historical events.
Now, I feel he goes too far here, in extending concrete shortcomings like education level to more abstract notions such as morality. While it’s likely easy to establish a concrete measurement of things like education level being lower for blacks prior to the civil rights movement, I think it’d be much harder to suggest such a thing could be equally established for morality.
And again, all of that aside, I think the reality of Buckley’s views on all of this are a bit more complex than you are making them out to be. From his wiki page:
William F. Buckley Jr. - Wikipedia.
Buckley and his editors used his magazine to define the boundaries of conservatism—and to exclude people or ideas or groups they considered unworthy of the conservative title.[46] Therefore, he denounced Ayn Rand, the John Birch Society, George Wallace, racists, white supremacists, and anti-Semites.
And specifically on segregation:
In the late 1960s, Buckley disagreed strenuously with segregationist George Wallace, who ran in Democratic primaries (1964 and 1972) and made an independent run for president in 1968, and debated passionately against Wallace’s segregationist platform in a broadcast on Firing Line. Buckley later said it was a mistake for National Review to have opposed the civil rights legislation of 1964–65.[citation needed] He later grew to admire Martin Luther King, Jr. and supported creation of a Martin Luther King, Jr. Day national holiday for him.[68] During the 1950s, Buckley had worked to remove anti-Semitism from the conservative movement and barred holders of those views from working for National Review.[68]
In 1962, Buckley denounced Robert W. Welch Jr., and the John Birch Society in National Review as “far removed from common sense” and urged the Republican Party to purge itself of Welch’s influence.[69]
You can watch his interviewing of Wallace on Firing Line in 1968:
Or him interviewing Leander Perez later that year:
(as an aside, I think it’s interesting to hear the same kind of populist, anti-media bullshit pushed out by Wallace as is put out by Trump)
I think that perhaps one thing about Buckley is that while his views regarding race were, to be kind, backwards at one point. However, I do not believe that they stemmed from actual hatred towards non-whites. And because of this, coupled with his intellecutalism, he changed his views over time.