disagreed — to fail to agree; differ: The conclusions disagree with the facts. The theories disagree in their basic premises.
clashed — Simple past tense and past participle of clash.
conflicted — unable to decide between opposing feelings or views
differed — to be unlike, dissimilar, or distinct in nature or qualities (often followed by from): The two writers differ greatly in their perceptions of the world. Each writer's style differs from that of another.
dissented — to differ in sentiment or opinion, especially from the majority; withhold assent; disagree (often followed by from): Two of the justices dissented from the majority decision.
