Then instead of calling for Buchanan to apologize why don't you apologize for slandering him.
One, it's not slander since the article predates the event.
Two, I am not the author.
Three, even if one and two didn't apply it would be libel, not slander.
None of which is germane to the thrust of the article which is that Pat Buchanan is anti-jewish and has harmed himself and the conservative movement with his witless and obsessive animus against Israel.