The freed slaves that went to Liberia became the most ruthless slave owners that 0lace had ever seen. They are still fighting about it now.
OP - the Americo-Liberians didn’t become the most ruthless slave-owners, I would argue that the previous Dahomey tribes in west africa were worse.
But the Americo-Liberians, the freed slaves retained their ante-bellum southern culture, religion and language and became the elite for 100+ years until they were brutally killed or expelled in the 1980s.
By the time they were sent there, the people had no relationship with the local African culture - and their ancestors might have been from other parts of Africa. They were no longer really “Africans” culturally