At the beginning of the third paragraph, the author refers to “those who believe that peace will not be attained until some super-tribunal is established” primarily to

B. acknowledge an alternative perspective

Explanation:

Frank B. Kellogg and Aristide Briand were jointly awarded the Nobel Peace Prize in 1930 for their work in establishing the Kellogg–Briand Pact where signatories agreed to negotiate rather than resort to war to settle disputes.

In Kellogg's acceptance speech, he spoke of those who believed that a super tribunal was necessary to punish those who act against peace because he wanted to acknowledge that there were those with alternative perspectives from him on how to achieve peace.

it makes them feel like hes not confident

hope it !