If you believe that, in society or in a particular group, the opinions of most people are very different from the opinions that are most often heard in public, you can refer to these people as the silent majority.
The silent majority should never again allow extremists to take control of the country.
The silent majority of supportive parents and teachers should make their views known. [+ of]
silent majority in British English
noun
a presumed moderate majority of the citizens who are too passive to make their views known