Praising Haile Selassi sounds only good, when you don't know much about his actually reign.
I recommend Ryszard Kapuściński's book about him:
https://en.m.wikipedia.org/wiki/The_Emperor_(book)
(And then there are Ragga hits like Chi Chi mon from TOK, which translates to burn the gays)
So in my conclusion, most of the theoretical theological ideology/religion is wishful thinking of a oppressed minority/ex slaves in poverty who dream of a better future.
And some of them turned to fanatic bigoted racists themself. And some just want to live the good life, avoiding conflict wherever possible. With those you can get along very fine..
(And my favourite reggae band alive - groundation - is mostly white and not from Jamaica, but I really don't care about that)