The original question was about being a source of vicarious pride.

The actual original words: "so then need to attach yourself vicariously to the success of other white people". As I say: success rather than excellence as such.

does being one of the worst US presidents count?

For this purpose, it doesn't matter whether you consider him "one of the worst", nor whether he is objectively "one of the worst" (whatever that might mean). It matters whether he's someone black people might attach themselves vicariously to the success of. Looking at the relationship between race and political affiliation in the US, it seems unlikely that most black Americans would consider Obama "one of the worst US presidents".

(Of course the whole "vicarious attachment" thing is just one guy's analysis of what "white pride" movements are about. I don't know whether he's right about "white pride" movements, still less whether something similar is true of "black pride" or "gay pride" or whatever. The application of his words to other __ Pride movements was yours, not mine.)