How many innocent people have been sent to the gallows? Lynched? How many people will be killed in your revolution? How many people are being killed due to Rush Limbaugh's and Alex Jones' propaganda?

Anyway, perhaps this is the reason for the confusion:
"The Weathermen largely disintegrated after the United States reached a peace accord in Vietnam in 1973, which saw the general decline of the New Left."

The Weather Underground I suspect is very similar in nature to Stalin's communist party. The police officers sited above died in 1981. The social revolution was done and long gone by then.