那是个宗教问题。用英语怎么说？

那是个宗教问题。

That's a religious question.

religious

adj. 虔诚的，笃信宗教的，宗教的，谨慎的；n. 修士，修女，出家人；

例句
She carefully tried to balance religious sensitivities against democratic freedom.
她谨慎地试图对宗教情感和民主自由两者作出权衡。

question

n. 问题，疑问，怀疑，议题；vt. 问（某人）问题，对（某事物）表示[感到]怀疑；

例句
...certain assumptions which are accepted without question as absolute truths.
某些未经质疑就被作为绝对真理而全盘接受的假设