Two short stanzas, and a lot of unease packed into them. The speaker says there is a war inside their music, and the word "harbor" matters here. A harbor is a place of shelter, so the speaker isn't just describing violence in the music but admitting to keeping it, almost protecting it. The title, "Rocker," suggests loud, driving music, though the poem never says so outright.
The second stanza jumps somewhere colder and more political. "An ordinary yes" is a small, everyday word, the kind of agreement or approval anyone might give. Yet it "can kill a child." The poem seems to suggest that large-scale harm doesn't always come from monsters; it can come from routine consent, a vote, an order, a shrug. The speaker's feeling reads as guilt, anger, or helplessness, and perhaps all three. The mood is stark and unsettling, leaving the reader to connect the music's inner war to the real one outside.