They do this for no other reason than because they need this or that.
Sadly enough, I really believe that there are people who need to cause conflict regardless of the consequences. They feed off the disturbance it causes and don't care about the ramifications, no matter how far they might reach.
Thank you for sharing your views on empathy. It is becoming such an underused emotion. Almost like considering how other might feel is no longer 'cool'. It's great to read that there are still people in the world who use it.
Thank you very much @steveblucher. I'm glad that you enjoyed my views on the subject.