Earlier quoted context omitted.
It's evidence of a fundamental misunderstanding of what free speech is and why it's important at the highest levels. Free speech is the right to say things that others find offensive. If being offended is enough of an excuse to silence others, then anyone, at any time, can silence anyone else with impunity. If this power is only given to marginalised groups, then it becomes a matter of who defines marginalisation and…
I happen to favor the old interpretation of free speech, but I think there's a strong argument that the traditional approach of defending all free speech facilitates a system where black people and others have been denied their rights for generations, and that we must act now to ensure their rights - that waiting any more is criminal.
The only thing restrictions on free speech incentivise is conformity to the ruling party's policies and there is an implicit assumption here that the democratic parties values are really the correct ones - which many people of colour will dispute.
The moment the Republicans take over (which they will inevitably considering how few campaign promises Biden has so far delivered), they will turn this on groups like BLM and the Antifa movement in general.