terrorist
ˈtɛrərɪst/
noun

a person who uses unlawful violence and intimidation, especially against civilians, in the pursuit of political aims.
"four commercial aircraft were hijacked by terrorists"
synonyms: bomber, arsonist, incendiary; More
adjective

unlawfully using violence and intimidation, especially against civilians, in the pursuit of political aims.
"a terrorist organization"

Take out the word 'unlawful' and this describes most government thugs! Of course in the army those 'civilians' are called 'collateral damage'.