Using or not using the word Aryan isn't particularly relevant. The ideas themselves are racist.
I would quote bits, but you can pick any sentence of the original quote.
Re:Cosmopolitan Railway
by mshockwave on Monday March 14, 2022 @12:32PM
(#30674485)
agree, whether it's Aryan or not, domination by a single race is purely racism.
So this is using "Aryan" in exactly the sort of manner that the Nazis did--referring to the Indo-European (white) "race" as Aryans. The racial theories of the Nazis actually originate in the mid-1800s, although during and after World War II, these theories fell out of fashion quickly.
The term itself comes from the self-demonym of Indo-Iranian peoples (ultimately from Sanskrit), and Indo-Iranian has generally replaced the term 'Aryan' in scholarly contexts to avoid the racial connotations of the Nazis.
I'm going to have to spend some time at some point learning about the history of that word and concept prior to the Nazis.