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This is conspiracy theory.
+1 to this.
Apart from Roger Stone that you* mention, who are all these geniuses you speak of? Where do they work? How are they paid? It's easy to point towards some faceless someones in Trump's circle and suggest some opaque and nefarious plot, but in doing so you're straying into conspiracy territory. To my knowledge Stone, Manafort and Bannon did help a lot before and immediately after the 2016 election. But the more recent wave of Q anon and evangelical support seems to mostly be Trump himself throwing shit at the wall and figuring out what sticks.
*answering Leschaches, not Eejit
This is conspiracy theory. The Evangelicals love him because he is, like them, a fascist. It doesn't run much deeper than that.