He also explicitly said he'd learned his radical ideas from 8chan in his final post there; and furthermore, there's good reason to believe his selection of travel destinations was already motivated by his far-right worldview of a 'Muslims-vs-the-West' conflict.

Lastly, it is a mistake to take a document intended as propaganda directly at face value; for instance, his claims of "ecofascism" on inspection seem to be more intentionally selected to inspire infighting between political left and right (one of his aims he claims to have regarding gun legislation) rather than motivated by any genuine concern for the environment; for example, his manifesto was devoid of environmental concerns unless we were to first concede a fascist obsession with racial birthrate disparites is an "ecological" concern.