Because people like these ones we all suffering. This is why the citizenship is getting tougher. Read news below
http://news.ca.msn.com/top-stories/farah-mohamed-shirdon-of-calgary-fighting-with-islamic-state-of-iraq-and-syria
http://news.ca.msn.com/top-stories/farah-mohamed-shirdon-of-calgary-fighting-with-islamic-state-of-iraq-and-syria