What are real-life examples of intelligent people who were feared or not accepted by
others?

Two examples of intelligent people feared by others were:

Galileo Galilei

Sigmund Freud

Explanation:

The reasons behind this answer are that Galileo Galilei developed the ideas of Copernicus and provided evidence to make the statement the earth was not the center of the solar system. Therefore, he was confined by the church and sentenced to be captive in his home. Sigmund Freud explained human behavior under the psychoanalytic theory and Hiler believed he was dangerous because he fought against superstitions and beliefs that claimed human catatonia as well as other condition had deep explanations and were a consequence of social segregation, and domination. Therefore, he was put in jail and his books were burned.