This is Christianophobia, plain and simple.
Imagine if a Muslim student did the same, respectfully requested not to counsel but to refer gay couples?
Does the psych school respect a female Muslim student’s need to wear her hijab? A male Jewish student to wear his yarmulke? If so, they need to respect the Christian religious tenets as well.
A better term is staurophobia which is an irrational fear/hatred of the Cross especially of Him Who it represents
I did not coin the term; another poster did but is a very accurate description of the pathology involved.