The word fascism comes from Latin Fasces, which was a symbol of power and prestige in ancient Rome. The original slogan was "strength comes from unity" (strength comes from unity). The most typical generalization of fascism is: "Individuals obey the collective, and the collective obeys the leader."
For fascism, a more accurate definition refers to various forms of violent nationalism and centralized movement that reached its peak in the 1930s and 1940s.
This is definitely a derogatory term for people who love peace and democracy.