to attack (a person)

attack, usually with words

to deny the truth of (something said or written, a person who has given a decision etc)

be at variance with

to act in opposition to( a low, a custom)

go against, contradict

to speak publicly against (a person)

condemn, attack

to prove (something) to be wrong or false

prove false

to accuse (a person) of a serious crime, e.g. against a profession or the State

denounce, censure