If that's what is was, yes, i'd be a problem. But it appears, from this witness, it was not. So let's suppose this witness is a good witness.
In some cultures it's natural to only say things out loud that one has thought of 'thoughtfully'. In others you say a lot out loud but without meaning much.
Just imagine a conversation between two sorority sisters or two fraternity brothers. They can have some pretty horrible things they say about other people --it's quite disgusting; I've overheard them. Would it be fair to bring those conversations up later in life, or as they're being considered for a job? should those conversations be "wrong"?
I'd rather people be free to have all kinds of nasty thoughts --but provide disincentive upon acting them out --not just thinking them.
Another question. Now, let's say said reporter might say something under her breath to confidants. Let's suppose she's happy to see some unraveling, and let's suppose the reporter/journalist even says some hyperbolic things --should such a reporter now be attacked for expressing such feelings? People are people and I think should be free to feel enmity against others --we can't pretend we like everyone out there.