Defence stocks won't go up or down based on whether I invest in them. If I invest, it won't prolong the wars, and of I don't invest, it won't cut them short.

The death and destruction is happening anyway and will continue to happen. Why shouldn't I make money off that?

It's not like I'm even making money from the violence, I'm just making money from the movement of a number on a screen that's somehow connected to a company that builds the tools of the violence.