Would you advise against using sensical at all? I've seen not sensical, and nonsensical, but you're right, I've never seen just sensical.
It's not a word I've ever heard. I doubt many others have, either.
True. It's really the last sub-sentence that contained any metaphors (I think).
Silence cannot be listened to.
You only notice silence if you listening. If you listen, you can hear the silence.
Refers back to the rabble that offended me. Instead of their insults, now, the only thing I can listen to is silence. Is that a metaphor?
No.
Silence cannot echo. Refers back to the rabble that offended me. Now, the only thing produced by on where their mouths used to be (the skulls) is silence. Is that a metaphor?
No. It's just language.
By the way, was I wrong to use the definite article before metaphors in my original post?
Yours truly.
It's meant to mean "My friend insulted me. I lost it. I killed them. Now I can't hear their insults."
I didn't understand that from reading it. It wasn't clear what "shut up the rabble that offends" meant. Now I know. Saying offended would help a little. But shut up doesn't mean kill., so I still wouldn't have gotten it.
And how did you get from friend (one person) to them? Who are they? It's confusing.