> It's exactly the sort of thing countries at war do
It's not, usually armies do not target civilians, and especially not civilians upper class (which devs are in Gaza). For multiple reasons, but one of those was very clear in Ukraine: if they killed Chernobyl's keepers, or Zaporiga's engineers, this would have led to troubles.
Civilians can absolutely be targeted if it fills a legitimate military objective. And Hamas doesn't follow the rules of war and doesn't distinguish between civilians and military objectives either. It's like how Hamas and Hezbollah both use journalists as spotters and then complain when they get killed. Communications networks are 100% legitimate targets and so are the people maintaining them.