Benji Hart needs to stop hating and understand that there are different kinds of "activism" and that people fight oppression with whatever weapon they have to fight it with where they are at the time.
Beonce' could have just as well remained silent and not risked anything, but she made a conscious effort to make a statement and/or to at least use the platform/public forum that she has been afforded to call attention to the unnecessary racism, oppression and death being inflicted on Black [and Brown] people in America.
Beonce' chose to, at least, get people talking or keep people talking about a subject that should not be allowed to be faded out or overshadowed by distraction propaganda of America's biased corporate owned, operated and controlled media.
So, in Beonce's case, 'Black celebrity is NOT undermining any movement', but to the contrary, this time, just like so many artists, musicians, entertainers, actors, actresses, celebrities, etc., during the Civil Rights Movement, Beonce has 'put her money where her mouth is', taken a risk with her 'celebrity', and stepped out of her comfort zone, to call attention to, and celebrate the Movement.
Benji Hart is an activist, artist, and youth worker dedicated to radical education. Much of his work focuses on using the dance form of vogue to teach Black and Brown queer history, sex positivity, and prison abolition, and to empower poor and working queer communities in creative and celebratory ways. He strives to combine arts and education to unite oppressed collectives and plan direct action. Currently he is a drop-in worker at the Broadway Youth Center in Chicago, a community space for trans and queer youth experiencing homelessness. His writing has been published in Salon Magazine,The Socialist Worker, Cooperative Catalyst, and his own blog, Radical Faggot.