Anyone connected to this account should ostracize them until they give a full, unconditional apology to Ms. Walker.
This type of nasty racism is a relic of the 1960s.
It is stupid, predictable and unimaginative. It is the product of racist thinking, it has no place in modern political discourse.
Updated: If anyone I know defends this filth, or even tries to, I will block them on Twitter without hesitation.