Sectarianism can be defined as a practice that is created over a period of time through consistent social, cultural and political habits leading to the formation of group solidarity that is dependent upon practices of inclusion and exclusion. Sectarian discrimination focuses on the exclusion aspect of sectarianism and can be defined as 'hatred arising from attaching importance to perceived differences between subdivisions within a group', for example the different denominations of a religion or the factions of a political belief.