To be sure, he's not alone in some of that. One of my mentors has a similar career arc as Carson's': from poor black kid in the Southern USA to dual PHD/ from Oxford...and he, too, doesn't believe in Evolution*. But add to that the other stuff- assertions about Jews being able to fend off Naziism with small arms, comparing Obamacare to slavery, claims about the pyramids being granaries, etc...
In contrast, the black intelligencia in general- while fairly conservative- is NOT anti-science. ESPECIALLY those with STEM degrees. Black doctors are praising the ACA for getting their patients out of ER rooms (reactionary medicine) into doctors's offices (proactive medicine), and the like. You don't find black archaeologists positing the granary theory. Most black MDs accept Evolution as "the fundamental theorem" of biology which makes their work possible.
In a sense,
he is such a departure from our norm that he plays into the stereotype of being uneducable. He seems impervious to that which does not conform to his worldview.
And that disturbs those he inspired or who consider(ed?) him a peer. Here's an example:
https://www.washingtonpost.com/post...f-black-doctors-now-were-disappointed-in-him/