"The launch sites" for these primitive rockets are random places in the fields from which the rockets were fired. The people killed in "immediate destruction" are more likely to be people working on the land than the people who launched the rockets, who aren't too likely hang around after firing them.

Of course anybody killed will be identified by the IDF as responsible for firing the rockets. Dead men tell no tales. Nor do dead women or children.

I suppose the British could have responded to IRA|bombs by carrying out airstrikes on Dublin...