I think not wanting something you created to be used to kill people is fine.

Edit: Jesus Christ, I did not think the idea that a corporation would want to stay out of a national conflict would be such a controversial idea!

If I had invented something that I had designed to improve and benefit the world and I found out that it was being used for the purpose of killing, I'd be absolutely horrified, regardless of my allegiance to any side.

Downvotes away I guess!