Cool! Thank You.
He puts Mohammed and Ali both in the circle of sowers of discord, schismatics, and the like. M is cleft from throat to anus, and Ali form chin to forelock - both as the embodiments of division.
My Sinclair edition has in the notes that there was a theory that M. was formerly a cleric, a cardinal!
But since he tore “the world” apart with religious war, he ends up torn apart himself,over and over again.
And Ali, a cousin of M., was the center around which the schism between Shia and Sunni developed. So together they are the perfect manifestation of division.