Honestly I think I probably overfocused on the second part, rereading it now, the statement is definitely still ominous, but less so than before.
I dunno, any time someone says 'I'm not going to feel guilty' it implies that there's a reason they normally should feel guilty, which usually implies that they're intending to do something bad in turn. Sort of like 'I'm not going to apologize' or a similar statement. Saying it implies that under other circumstances you would apologize/there would be an apology-worthy action.