Black Hebrew Israelites

A sign in Harlem, New York .
On the left side of the Hexagram there's a link to a website. I tried it - it's broken.
ICUPK stands for

Israelite Church of Universal Practical Knowledge

I read that

Some of the ICUPK's contentions [are] that the apostles and prophets of the Bible, including Jesus, were black, and that people of color make up the true 12 Tribes of Israel.

Picture is courtesy of "dM.nyc" who published it on Flickr.