Likelihood is that most people reading her remarks will just think she was nasty rather than agree with her. If your post was inflammatory or argumentative in any way maybe it's best to remove it if you're of a sensitive disposition. With most places, but definitely public forums, I try to heed the advice someone gave me once which was to "just ask yourself, does it need to be said? Does it need to be said now? Does it need to be said by me? If the answer to any of those questions is No, then keep it to yourself." It wasn't advice I particularly cared for at the time, and I can't say I manage to heed it 100%, but I'm a work in progress. And the times I have heeded it have saved me plenty of unnecessary resentment and anxiety, no doubt. Esp places like FarceBook where people really do want to be offended and offend and create drama to make their lives more interesting it seems.
Hope you feel better soon.
BB