"Jewish State" literally means religious norms and holy scriptures are considered a law. Rabbinical courts are part of the Israeli legal system, which operates religious courts in parallel to the civil court system.
The Basic Laws, which sort of comprise the makeshift constitution of Israel, don't seem to make any religious references, but rather refer to the founding UN principles like human rights.
Even civil courts are allowed to refer to holy texts if the law is not clear.
could you please show me any law in israel, that gives blanket approval to civil courts to refer to holy texts if the law is not clear ?