Might be a silver lining in this cloud: this ruling could be legal ammunition for the *defense* of a *Christian* teacher who professed his or her belief *in* the Creator.
Neutral is neutral; hostility to one side *or the other* is not neutrality.
Put another way, militant atheism is a religion, too; if it must be respected in the classroom, than so must Christianity.
Except they wouldn’t be facing a student lawsuit; the student would complain to the school board, the school board would fire the teacher, and the courts would rule that it was an employment matter, and not a first amendment matter.