god, what nonsense.
1,500 page?!? where did you this get from (or better where did your source get this from)?
https://www.thenationalherald.com/235152/nz-manifesto-resembles-norway-mass-murderers-text/
It's 74 pages and originally was 240 pages according to the text.

he is largely a fucking alt-right type of guy without the jew hate and lots of 8-chan//pol attributes.
his most used term was eco-fascist and his rolemodel is Oswald Mosley, British fascist. additionally he threw in all kinds of terms like this once mentioned China sentence, making his position an amalgamation around the eco-fascist. he is not a communist at all according to the manifest and the 8chan post (and that say I as a libertarian).