I think that generally "fighting" antisemitism is useless.
Jew-hatred is a rotting of the brain and a sign of barbarity. It cannot be "fought" with "education".
What Krauthammer is suggesting here is a little different than another useless, Official Jew "fight" against anti-semitism.
He is saying that regular people simply need to do regular, or even slightly irregular and creative things to show that they stand in solidarity with Jews (and thus-Western civilization), and simply be vocal and visual about it.
This is the best part of the article:
"Don the yellow star and wear it proudly."
I wear my Jewishness out front and so do my friends- both Jewish and non-Jewish.
That's the whole point.
Bullies back down when confronted and smashed back hard.
That is the only way to fight.