The leader of Hezbollah accused Israel of crossing “all red lines” in an “unprecedented’” attack which detonated walkie-talkies and pagers across Lebanon – as Israel said it had launched a fresh wave of strikes across the south of the country.

If we assume, as virtually all observers do, that Israel was behind Tuesday's astonishing mass pager attack on the ranks of Hezbollah, what does it tell us about what Israel is thinking? In the absence of any official Israeli comment,