In all things it is best to go to the originals; we would not, after all, accept Nietzsche's criticism of Christianity [much less a mere review of his book] without going back to the Bible to see whether his criticisms and interpretations were justified.

The following quotes from the Hindu 'Rig Veda', considered to be the oldest extant religious book in the world, will set the record straight once again;

"Indra protected in battle the Aryan worshipper, he subdued the lawless for Manu, he conquered the black skin".
[Rig Veda I.130.8]

"The black skin, the hated of Indra, were swept out of heaven".
[RV IX.73.5]

"Stormy gods who rush on like furious bulls and scatter the black skin". [RV IX.73.5]

"The Thunderer bestowed on his White friends the fields, bestowed the Sun, bestowed the waters". [RV I.100.18]

"Black skin is impious and lowly". [RV II.12.4]
The Sanskrit for the last quote is;
"dA'saM varNam a'dharaM gu'nA'kaH". In my 'Aryanosophy' post of December 2001 I give more Sanskrit and other apposite quotes from the Zarathustran Gathas, and the Laws of Manu, which latter is concerned with keeping the Aryan ancestors of the invading, conquering master race separate from the aboriginals.

The Aryan invasion of India is put at about the middle of the 2nd millennium B.C., and the Doric invasion of Greece is put at around the same time.
The ancient Greek god Zeus is a close linguistic and functional counterpart to Dyaus in the Veda.
The Greek Goddess Athene was known as 'glauk-opis' [see Homer's ancient Epics 'The Iliad' and 'The Odyssey']; this is usually translated as 'grey-eyed', but Pausanias remarks that he saw statues of Athene with blue eyes [Classical statues were always painted in ancient times, and many show traces of yellow pigment for hair, and blue pigment for eyes]. That blond hair/blue eyes was connected [i.e., blue-eyed meant blond and vice versa] is shown by the fact that the Latin word for blond, 'flavus', is cognate with the Germanic word 'blue'.
The hero of the Odyssey, Ulysses, is described by Homer as fair-haired [check refs. XIII.399; XIII.431], as is the god Apollo;

"Fair daughters of thunder-girt god, with your bright
White arms uplift as to lighten the light,
Come to chant your brother's praise,
Gold-haired Phoebus, loud in lays".
[Delphic Hymn to Apollo ('Phoebus' is another name for Apollo); translation Swinburne]

As in the Rig Veda, the Homeric Epics point to a Northern setting for the action; this is gathered from linguistic references to flora and fauna as well as weather conditions.
On the latter we note references to the midnight sun [Odyssey XIX.226] and revolving dawns [Od.XII.3-4], all typical of the Artic regions.

"That the words which all the Aryan languages share in common must have existed before the Atyas separated, and that they may be used therefore as evidence of what was seen and heard and known and thought and done by the Aryas at that early time, is a thought so natural that we need not wonder at its having occurred independently to various scholars.
If we find the same words with the same meanings in Sanskrit, Persian, Armenian, Greek, Latin, Celtic, Slavonic, and Teutonic, what shall we say? Either the words must have been borrowed from one language by the other, or they must have belonged to an older language, from which all these so-called Aryan languages were derived.
It is clear that all words, and all grammatical forms also, which the Aryan languages have in common, must have constituted the bulk of an ancient inheritance from which the principal heirs carried away whatever seemed most useful to them". [Muller, 'The Earliest Aryan Civilisation']

Muller's scholarship and objectivity are impeccable; I am lucky enough to have old, very old, copies of his collected works [no doubt on the banned index now], which brim with insights and intelligence. Here's a tit-bit;
"The ancestors of Greeks and Hindus had a common word for razor before they separated; while they improved the instrument, they retained the old name, and that old name they gave and retained, because shaving the beard had become to them at that early time a matter of social interest". [ib.]

The cultural/mythological/political parallels between the Homeric Greeks of the Bronze Age, the Germans of the Roman period, the Medieval Vikings, testify to the continuity of Aryanism.

And let us not forget why we are discussing this in the first place;
"The Celts were throughout a blond race. We do wrong if we connect those streaks of an essentially dark-haired population with some doubtful Celtic origin and blood admixture. On the contrary, it is the pre-Aryan population which makes itself felt in such places". [Nietzsche GM I.5]