Intro should introduce the 'militant African American protests' properly to show examiner you know what they're referring to (black panthers). Then, briefly describe the relationship they had with the peaceful protests. The Civil Rights movement wasn't as unified as is often believed, it had multiple groups, CORE, SNCC, NAACP etc, each with different character and slightly different aims, this fragmentation, it could be argued, worsened the effectiveness of the civil rights movement because the civil rights group wasn't monolithic. Black Panther success with the 'patrol the pigs' campaign did take some of the attention away from civil rights, but arguable not responsible for the lack of effectiveness in the civil rights movement in the 1960's.
The answer could also include a fragmentation of the 1960's. The civil rights movement was doing quite well up until '65, Birmingham, March on Washington, Greensboro, Selma, all happened in first half of the 60's. when civil rights movement moved to North America it wasn't so effective i.e Chicago Freedom '65-'67 was met with much resistance. Also, the civil rights movement was only effective when there was a lot of media attention hence why Albany '61 wasn't so effective.