Murdering people is immoral in any society, but whether a given slaying constitutes murder or not varies widely. There's justifiable self-defense, capital punishment etc.

> Killing people is immoral in any society

Most societies make an exception for killing enemies of the state. Soldiers are seen as heroes fighting for their country not as immoral killers.

I wonder if the Sentinelese find it immoral?

Looks like they find it less immoral than manipulating people into believing fake religious stuff.

Guns, cars and knives can kill people too. Also drugs and alcohol, how about banning people working on those stuff?

Went over your head didnt it? Nobody is talking about banning software. Here we are talking about developing software that is specifically designed for governments for hacking phones and spying on citizens.

Who would know it is deployed on another countries' citizens? If anything it is the Saudi who chose to use it, why shift the blame to the original developer? Hope you understand the point now.