I think sheltering environments are responsible for most of the pacifism present in modernity, especially if said environments are particularly reinforcing of certain docile behavior which they are.
Media outlets influence instincts only on a very rudimentary level. Once conflict is absent, it must be simulated behind a mimetic pretense which not only compensates for the lack of intrinsic struggle, but adds to it the subliminal edge needed to keep urges and instincts stimulated. "The medium is the message", as McLuhan says, because now survival has become a matter of making sense of what controls it, which is now the globalized transmission of information and communication at various nodal points.
It's simple to immerse oneself in the imagery of struggle or conflict, once the consequences and the costs have been eliminated such as in video games, or reduced to triviality such as on the news. It isn't that conflict is no longer part of the environment, but that it has become idealized making it a romance of human nature.