When the group asked why, the bouncer – gatekeeper, arbiter, paveside general – characterised this frustration and reasonable request for information as aggression.
Thus communist tendencies would be consistent with toughminded radicalism while fascism would be characterised by toughminded conservatism.
Meaning of characterised for the defined word.
Grammatically, this word "characterised" is a verb, more specifically, a verb form.