Marco Esquandolas said:
It's only trolling when you don't like the content.
I disagree with this statement.
I used to think trolling specifically meant posting inflammatory things that you don't actually believe just to start a **** show on the internet. I think the definition has evolved to include beating the dead horse of inflammatory, but still deeply-held beliefs.
Essentially, if you post something and your purpose for posting it is to inflame others rather than have an actual discussion, that is trolling.