Daleks were often the fascists of the Doctor Who universe. They're obsessed with purity, they repel any form of humanism and at some point they even spoke german.
In the tradition of Chibnalls very complex and precise political commentary they're also feel kind off trump-era in this episode. It's the story about power hungry and greedy conservatives making a pact with the extreme right and soon being devoured by them. Clearly my favourite Dalek episode so far.