It looks like Kristol resents Sarah's criticism of the McCain-Obama policy and is lashing out with a false characterization of her position.
from a later part of her speech that Rubin for some reason neglected to mention:
I believe that America must never retreat into isolation. The world would be less safe and less free without our leadership. And we must never forget that America has a responsibility to lead.
Pretty much exactly what he said in that piece there.
Maybe someone should ask Kristol what he thinks of that?