BLMBH2? I haven't seen that group in a long time.
Let's answer their questions/statements.
1) because all white people benefited from slave labor. yes. all white people.
2) No.
3) No. That's not a fact. That's a lie. The story they likely refer to is about Anthonly Johnson. Who was brought to the Virginia colony as...a slave by an English settler.
4) And? That what makes it okay? Makes it somehow less awful? There's no supply without demand, bucko.