Let me say some more words.
He is very similar to Breivik in many ways but has some differences like he travelled the whole world and he didn't plan and radicalize for such a long time in his home country like Breivik and as I understood he didn't even undertake the attack in his home country.
But he also did not choose randomly (like Breivik chose the government building + Utoya camp): on p. 12 he referenced a fb page. If you read the comments there now, you'll find out they formerly had this video on. But he did decide for other mosques in christchurch.
But he did decide for two other mosques and the first apparently one sees in his video. This mosque was featured in this article
Another about Christchurch is this one.

When you read closely, in both stories it is stated though that the guys attended there but were radicalized elsewhere (foreign country or the internet).

Another thing what is somewhat strange, is, that he had no hate against Zionist/jews. In a way like the pic from 4chan about ecofascism you showed.
I find it hard to believe that 8chan shouldn't be ripe with ZOG-narratives.