By the fact that he is teaching a Physics class shows that it is very possible that he is an atheist or agnostic and will do everything he can to destroy the academic careers of Christians.
All it would take is for one student in his class of 100 to sneeze, and 99 Christian students to say “Bless You” and those 99 students would lose a point.
Now suppose over the semester, each of the students sneeze two times and each of the 99 students say “Bless You,” that wound be 19800 “Bless You” said in class and 19800 points the professor can take off of Christians’ grades.
He will Destroy the academic careers of Christians!
He can’t flunk the whole class. Those affected should be able to bring many individual lawsuits.