Why was limiting Civil Liberties a problem for Americans?

There were several ways in which the Lincoln Administration limited civil liberties during the War of the Rebellion. Firstly Habeas Corpus was suspended, meaning that persons deemed unloyal to the Union could be arrested and jailed without showing due cause or charges (habeas Corpus). Secondly civil law was suspended in those areas of the South under Union Control and placed under martial law. Censorship was imposed on several newspapers and journalists, although in practice this proved to be difficult to enforce. Restrictions on commerce were enacted and enforced. These are just a few of the ways civil liberties were circumvented during the Civil War.