Black Panthers were aligned with numerous violent organizations. There was even a split within the leadership of the Black Panther Party whether it was okay to use violence or not.
Infiltration and prosecution were not necessarily bad things.
The radicals of the 1960s were active through the 1970s and 1980s, bombing buildings and robbing banks, among other activities.
The Weather Underground were NOT a 60s group, their first action was in the final months of 1969 and they were active into the mid-80s.
Bill Ayers helped form Obama's positions. I know undercover operations are important to protect all of us - but the FBI can't be the political enforcement arm of the democrat party...