From the beginning of the chapter:
While Bureau officials had their own ideological and bureaucratic interests in an anti-radical campaign, the Bureau’s primary function in 1919 was to contain and undermine social unrest and political movements, which might threaten the existing social, economic and political order. In particular, the Bureau was called on by the federal government in its response to the race riots, the national strikes and the anarchist and Communist movements.
"The Government Is Watching"
Political surveillance is usually perceived as a passive and concealed act, whereby information is collected clandestinely to keep the government informed, as a basis for the political decision-making process and to prevent political violence by extremist groups. However, in the following it will be argued that the Bureau's activity had an
additional and perhaps even more important purpose, namely to make the radicals aware that the government was watching and thereby to intimidate them into passivity. It should at the beginning be emphasized that, of course, the Bureau's primary objective was to collect information on the activities of the radical movement.