The Nation of Islam has as much to do with Islam as Barrack Obama’s church has to do with orthodox Christianity.
The Nation of Islam is shrinking, it was much bigger in the 1960s and 1980a than it is now.
Islam, as imported from Saudi Arabia and the rest of the world is growing though, in the USA.
Still it is only .3% of our population.
Our “Islamic Time Bomb” equivelent is Mexicans. You could make videos like this in LA showing the Mexicanization of entire neighborhoods.