If you set up an appointment to discuss the writing of a letter of recommendation, I will ask you: "How do you think the human species originated?" If you cannot truthfully and forthrightly affirm a scientific answer to this question, then you should not seek my recommendation for admittance to further education in the biomedical sciences.
The professor specifically states origination of the 'human species' several times. This indicates that he will not accept any non-scientific belief in the creation of man, and thus rules out any belief in a creator, even a non-Christian belief such as Einstien held.
I don't think the professor would have any problem with any form of theistic evolution.