"In so many of the little places of everyday life in which life is lived out, somehow democracy doesn't exist. And one of the creeping hands of totalitarianism running through the democracy is the Federal Bureau of Investigation… Because why does the FBI do all this? To scare the hell out of people… They work for the establishment and the corporations and the politicos to keep things as they are. And they want to frighten and chill the people who are trying to change things."—Howard Zinn, historian
That is how the government plans to get rid of activists and dissidents who stand in its way.
This has always been the modus operandi of the FBI (more aptly referred to as the Federal Bureau of Intimidation): muzzle anti-government sentiment, harass activists, and terrorize Americans into compliance.
Indeed, the FBI has a long history of persecuting, prosecuting and generally harassing activists, politicians, and cultural figures.
Back in the 1950s and '60s, the FBI's targets were civil rights activists, those suspected of having Communist ties, and anti-war activists. In more recent decades, the FBI has expanded its reach to target so-called domestic extremists, environmental activists, and those who oppose the police state.
Back in 2019, President Trump promised to give the FBI "whatever they need" to investigate and disrupt hate crimes and domestic terrorism, without any apparent thought for the Constitution's prohibitions on such overreach.