You say everything is an "abstraction" and then with strage divergence of thinking announce that morality is improvment in technique or " civilization."
This, however, leaves out human conduct with respect for law. Whether some conduct is an improvment over others is not only an "abstract" issue.
Anything can be regarded abstractly or concretly. You, in your innocence, fail to grasp that some people have a moral conscience and so find murder to exist.
Besides, when one is lied to one doesn't usually like it. Truth is regarded on the whole as moraly better than falsehood or lie. Even in concreto.