Its founder and leader, Anton LaVey, plagiarized The Satanic Bible in part from the White Supremacist book Might is Right. LaVey welcomed neo-Nazis into the Church, and all four Abraxas Foundation members—who were influenced by Might is Right—were connected to the Church

https://www.taylorfrancis.com/chapters/mono/10.4324/9780429200090-20/nazi-satanism-spencer-sunshine

What kind of Jewish organization welcomes in neo-Nazis?

And wait a second. "Might is Right" sounds sort of like Hitler when he stated

The stronger must dominate...if such a law did not direct the process of evolution then the higher development of organic life would not be conceivable -- Darwinist antichrist Adolf Hitler in Mein Kampf

So the better question is how Satanic is Nazism? The answer is very.

There are some low IQ fed nazis claiming Nazism is Christian, but they themselves love to mock Jesus and the Christian faith. They also deify Hitler to blaspheme God the Father and the Son of God. So this is all consistent with their true satanic nature. Buyer beware and don't buy in.

May the peace of God be on all those who love and seek the truth. Amen.