https://en.wikipedia.org/wiki/Double_tap_strike

So Israel is committing a war crime under the Geneva Convention, which it is signed up to.

https://www.ohchr.org/en/instruments-mechanisms/instruments/geneva-convention-relative-protection-civilian-persons-time-war

https://en.wikipedia.org/wiki/List_of_parties_to_the_Geneva_Conventions

At this rate the Lebanese army needs to actively fight back. There is no way that the Israelis will stop deliberately attacking civillian infrastructure.