This can go both ways. A majority view may be held complacently without being challenged much or often. A minority view encounters constant resistance and reminders that it is not held by many, and may potentially be more robust because of that. Either way, a belief ought to be based on facts and sound reasoning rather than group pressure, and even the most strongly held position ought to be held provisionally and subject to revision in the light of human fallibility.
>a belief ought to be based on facts and sound reasoning
Sounds good but what happens when a loud group bases their beliefs on alternative facts (and select only alternative facts that specifically support their belief)?