There is and shouldn't be a leeway on where an explosive hits. An attack is an attack and if you brush it off as only an accident you are not only showing weakness but also giving russians room to actually hit infrastructure under the guise of some bullshit and just claim it was an accident.

France and the UK already tried an appeasment policy against Germany right before the second world war, hoping to avoid another war.

I'm against any war but there has to be a clear line with zero leeway.