Colonial motif

1. Does "The colonial motif is not accidental" mean "for Freud motifs are not accidental"? Why "colonial motif" is used and what does it mean"? Does it use the metaphor of tapestry patterns?

2. Does "The irony is that modern progress would give rise to an exacerbation of spectral traces, as its dark side emerged" mean "it is interesting that, out of our expectations, modernism also, when its dark side emerges, gives opportunity to magical entities"?

Context:
It is almost as if in the face of the devastation wrought by enlightenment technologies there is an eruption of magical, older, forms of thinking that Freud, the enlightened scientist, deems characteristic of primitive states of being such as childhood which Western civilisation and adults in general should have surmounted. Freud subscribed to this Enlightenment view and the goal of his exploration of the unconscious was to bring this ‘dark continent’ to light. The colonial motif is not accidental. For Freud, the belief that natural objects have desires and intentions is characteristic not only of the omnipotence of magical thinking in childhood, but also the animism in
primitive societies. The irony is that modern progress would give rise to an exacerbation of spectral traces, as its dark side emerged.