A defamation suit would be near impossible based on the post. Phrases such as "white trash" are purely opinion and have no factual basis. As an opinion it is protected. The defendant could very easily defend the position as an opinion piece unless there were untrue factual claims such as the person is a sex offender.

Even then, the afflicted party must show actual damages in order to recover. The fact that it made her feel bad is not enough. She would need to show that she lost business, or incurred other expenses directly related to the broadcast...which we know she didn't because she wasn't even aware of them.