I think that's just groupthink. People tend to act on their beliefs about things like vaccines, Israel, and handgun ownership.
Of course, it's one of the earliest results in psychology that social conformity has an influence on people's beliefs, even on readily accessible questions like whether line A is longer or shorter than line B. To me, if somebody professes a belief, acts on that belief, and works to convince others of that belief, then they effectively hold that belief.
Of course, it's one of the earliest results in psychology that social conformity has an influence on people's beliefs, even on readily accessible questions like whether line A is longer or shorter than line B. To me, if somebody professes a belief, acts on that belief, and works to convince others of that belief, then they effectively hold that belief.