That's nice, but I would be happier if Irving, David Duke, and those verminous self-despising rabbis" were in a grave instead of breathing oxygen.
Understood, but murdering them would only strengthen the enemies of the Jews. It loses the debate by default. It says "I would lose to you in a debate so I must kill you to stop the truth".
By contrast, Alan Dershowitz has challenged Jimmy Carter to a debate over Carter's book on Israel/Palestine. Carter chickened out, and Dershowitz won and his side won. Dershowitz shows the way on this one.