The Role of Racial Identification in Black Lives Matter

There was this persistent critique and certain quarters of the hillary friendly liberal media though that bernie's emphasis on on class politics necessarily meant that he wasn't paying enough attention to racial justice. i have to say that i heard those criticisms and then i would see the films of uh Sanders's rally and there was always a healthy representation of the black lives matter peoplethere. is it possible for people to have a collective racial we in the fight against racism without falling into that trap of essentializing race?  i'm thinking particularly of this at this time when so many young black people are mobilizing under the banner of black lives matter which has that racial category right in its first word.