By "it" are you referring to the 40 confirmed deaths by their 1907 giant bomb explosive concussion blast, that they hid the material in a sofa, or the hand grenades and pistol shooting the group acted with upon the hostages they took in the nearby bar and everyone else between them and the rubles on their way into and back out of the bank?
Nice touch that Stalin did not participate, yet watched from outside the blast percussion ring, his scheme be put into activist action. Sorta like 1970 Angela Davis with the getaway van.
Sure is a lot of violence, bombings, death, etc; that happens around this ideology
https://www.fbi.gov/history/cases-and-criminals/weather-underground-bombings
https://en.wikipedia.org/wiki/Marin_County_Civic_Center_attacks