Which phrase in this excerpt from a 1964 interview with malcolm x indicates that he is explicitly stating an opinion?
"i think all of us should be {critics of each other}. when you can't stand criticism {you can never grow}. {i don't think that it} serves any purpose for the {leaders of our people} to waste their time fighting each other needlessly."

{I don't think that it}

Explanation:

In the phrase above , Malcolm X indicates an opinion. First, he uses the first person singular :"I". Then, he uses a verb of opinon: "think". He uses a non assertive sentence since he wants to show his disagreement with the fact that   there are leaders who do not like being criticised. Malcol X thinks that if the leaders do not accept criticism, they are not gronw ups. The "it" he uses in his phrase refers to not accepting criticism.