If I don't use them near civilians, chemical weapons won't kill civilians either, but this is hardly meaningful. (politics.stackexchange.com)
However, to protest the death of civilians by killing civilians shows a lack of commitment to justice and only a desire for power. (religion.blogs.cnn.com)
Also, killing civilians results in no penalties and the mission borders are a bit small, automatically ending a mission if you cross it. (gametyrant.com)