I'm not sure what you're suggesting.

On the left, a bunch of supposed BLM supporters with questionable ties to the Clinton campaign stormed Bernie's platform and threatened to shut down his event unless they got to take the mic and say whatever they want. The crowd boo'd them, but Sanders properly understood that if he wants the African American vote, obviously he can't fucking have security physically detain a bunch of uncooperative black women in the wake of massive protests of white-on-black cop violence.

On the right, Trump clearly bought out a bunch of black women to speak against their own self-interest.

You know, not being a brash idiot does not entail weakness.

I won't call Trump an idiot because it's not relevant -- but it's very clear to me that what you're suggesting Bernie should have done (physically detain emotionally unstable black women in the wake of a supremely politically charged race protest) is not "strong" -- it's utterly idiotic.