Abstract This master thesis examines the development of the Islamic discourse on Internet, by a research of the two Islamic expressions ummah and Islamic state. As a platform for the research is a discussion about 9/11 used, in which Giovanna Borradori interviews Jürgen Habermas and Jacques Derrida about terrorism in the modern time. The research has been made in two steps, the first research is made in December 2005 and the second in February 2015. In the first research is the examined words study in BBS’s and blogs, and in the second case is same expressions examined in Twitter. As analyse method is Hans- - George Gadamers displacement of perspective used, to understand the movements in the discourse and the development of Islamic use of Internet. Manuel Castells thoughts about the network society and his work about the power of communication are used as a theorem to understand the Internet and its development in the last decades. The conclusion of this work is pointing at a progression in the use of Internet as a tool for communication in the Islamic community, and a displacement of perspective from western society as the primary enemy, through an internal religious movement to a more diversified conflict among different Islamic groups. Keywords: Internet, E-jihadism,, network society, Islamic, ummah, Islamic state, Twitter, blogs, BBS’s, mediated history, modern history