Why is illegal for CS gas (tear gas) to be used in warfare but countries can use it on their domestic population?

Question

Title.

In: 4

Answer 1

Its like casual or competitive gaming. You see broken game mechanics being used in casual like super strong gun or some exploits. But they might be banned in competitve. Its not so much fun when some random bloke just sprays the whole trench with fire instead of knifing each other in the gut. More fun to watch.