One fundamental divide

I am always interested in the deeper assumptions that inform ideology. One i have noticed is an attitude toward killing. The left either has the illusion that violence is not a fundamental form of human communication or ( this was more true in the USA in the 20th Cent) deaths can be excused if they are part of a struggle for liberation or a struggle to make the world more equitable. The Right seems to think that these motivations are among the worst. Until the rise of Bush II Rightism was anti-utopian. Deaths occurring in the pursuit of national glory or profit are acceptable collateral damage. Death from a struggle for liberation ( excepting of course the bourgeois revolution of the US) is dangerous and sinful. The attitudes of the Left toward violence would make a good study, though the first obstacle is definition: who is Left. the Right seems to have fewer conflicts about which deaths are acceptable.