Why were American leaders so much concerned about sedition and dissent during World War I than they were during the Civil War or World War II?

The years surrounding America's involvement in World War I were a ... They denounced the Sedition Act in particular as "unconstitutional," as a ... The federal government also intruded upon civil liberties, especially the right to dissent ... issued no fewer than five papers out of Chicago alone, three of which were in German.