Doesn't matter what the veracity of creation/ evolution is. It's this professors decision on who gets letters of recommendation from him. As long as he's not seeking bribes or sexual favors he can set whatever prerequisites he likes. Letters of recommendation are a matter of personal opinion and personal integrity. Nobody has to write a letter of recomendation for anybody they don't think deserves it. There are other professors the kid could have gotten letters from.
Exactly so. 100% correct.
"It's this professors decision on who gets letters of recommendation from him."
I agree w/ your position but, shouldn't his letter of recommendation at least take into account the quality of work the student produced in this professor's class?
If the student aced the class, the professor should not withhold that information. Adding an extra-curricular requirement involving "belief" smacks of academic manipulation.
And that's petty.