On "federal agents" in the USA

The following is from https://en.wikipedia.org/w/index.php?title=United_States_Department_of_Justice&oldid=969083258#History:

Grant appointed Amos T. Akerman as Attorney General and Benjamin H. Bristow as America's first solicitor general the same week that Congress created the Department of Justice. The Department's immediate function was to preserve civil rights. It set about fighting against domestic terrorist groups who had been using both violence and litigation to oppose the 13^th, 14^th, and 15^th Amendments to the Constitution.

Both Akerman and Bristow used the Department of Justice to vigorously prosecute Ku Klux Klan members in the early 1870s. In the first few years of Grant's first term in office, there were 1,000 indictments against Klan members with over 550 convictions from the Department of Justice. By 1871, there were 3,000 indictments and 600 convictions with most only serving brief sentences while the ringleaders were imprisoned for up to five years in the federal penitentiary in Albany, New York. The result was a dramatic decrease in violence in the South. Akerman gave credit to Grant and told a friend that no one was “better” or “stronger” than Grant when it came to prosecuting terrorists. George H. Williams, who succeeded Akerman in December 1871, continued to prosecute the Klan throughout 1872 until the spring of 1873, during Grant's second term in office. Williams then placed a moratorium on Klan prosecutions partially because the Justice Department, inundated by cases involving the Klan, did not have the manpower to continue prosecutions.

This was something I read about last night in Ron Chernow's biography of Grant - the impression I had was that the role of federal (justice - there were others) agent was basically created to protect black people against white supremacists.

“To aid the anti-Klan effort, Akerman fielded a vast array of resources, including federal marshals and attorneys of the brand-new Justice Department. Members of the nascent Secret Service pitched in with undercover detective work.” 

Are these the people now bashing and abusing black people and their supporters on behalf of a white supremacist US president?

If yes, wow - “how the mighty have fallen”.