Where's the lie? William Buckley was a proud white nationalist[1] and the magazine he founded continues to publish all kinds of blandly racist content and anti-semitic content (and authors)[2].
The lie is that they are racist today, not 50+ years ago.
The examples in that list of controversies are weak to say the least. In each case that could vaguely be considered racism or antisemitism, the higher ups at the magazine issued a rebuke and often dismissed the writer. Is this really all you got?