Doubt.

If they had snuck explosives into cell phones of IDF soldiers and then detonated them in mass while the soldiers were at home with their families it would not be acceptable.

I totally agree that this attack was indiscriminate. I think part of the point was the psychological impact of being attacked that way. How could you ever feel safe again after knowing anything around you could be a small explosive device.

It is a huge escalation that will undoubtedly created another huge wave of terrorism. Israel has always been its own worst enemy.