C. S. Lewis was a close friend of J. R. R. Tolkien and would have been familiar with Tolkien’s take on dwarves because early drafts of LOR were read to Lewis’s Oxford Literary Club: The Inklings. To the extent that they may differ, I’ll take my stand with Tolkien.
Hint: It's an archetype, a small group that can't listen, can't hear anything but their own silly notions of purity, self righteousness all the while fighting to put an evil tyrant back on the throne while thinking they are "pure".
This is sounding very familiar.......