He was fronting a nazi rally in plain sight. They were using thinly veiled codes, giving them just enough room to hide, but obvious enough for their half-witted followers to latch onto. He calls the the media “Lügenpresse”, which is German for "lying press", a term used by the nazi's to discredit the media. They chant "Hail Victory!", this is the literal English translation of "Sieg Heil!" in German. And the reference to children of the Sun is most likely a reference to the Cult of the Black Sun, which was a religion practiced by the SS.
Symbol for the black sun.
Symbol for the black sun.