Belief in God and belief in an after life are two separate beliefs. Jews did not include a belief in an after life in their earliest scriptures. They were heavily influenced by Zarathustra and Zoroastrianism during the centuries that the two faiths coexisted in the Middle East and eventually adopted the belief in the Torah and commentaries.
Being a nihilist does not mean that you don’t appreciate the rich traditions and constructive beliefs that all cultures contribute as humans struggle with the suffering of inevitable death. It just means that you don’t believe you have the “right” belief and everybody else is a pagan.