Reply in kind

I was asked at a formal diner by a very smart person yesterday whom I hardly know, why Israel does not respond "in kind" to Hamas' rockets. I asked him if he thought that if Israel used its schools as a launching pad for 2,300 WWII-technology rockets, aimed into Gaza's most populous neighborhoods, the world would finally accept our actions as "justified and proportional". Then he asked to stop talking about it because I was inappropriate.