Yes, religion is for the realm of fiction. Heaven as a destination for souls is a Greek myth adopted during the 2nd Temple Period by the Hebrews. Using a savior deity as salvation is also a Greek Hellenistic myth adopted during the same period.
During the period of the
Second Temple (c. 515 BC – 70 AD), the Hebrew people lived under the rule of first the Persian
Achaemenid Empire, then the Greek kingdoms of the
Diadochi, and finally the
Roman Empire.
[47] Their culture was profoundly influenced by those of the peoples who ruled them.
[47] Consequently, their views on existence after death were profoundly shaped by the ideas of the Persians, Greeks, and Romans.
[48][49] The idea of the
immortality of the soul is derived from Greek philosophy
[49] and the idea of the
resurrection of the dead is derived from Persian cosmology.
[49] By the early first century AD, these two seemingly incompatible ideas were often conflated by Hebrew thinkers.
[49] The Hebrews also inherited from the Persians, Greeks, and Romans the idea that the human soul originates in the divine realm and seeks to return there.
[47] The idea that a human soul belongs in Heaven and that Earth is merely a temporary abode in which the soul is tested to prove its worthiness became increasingly popular during the
Hellenistic period (323 – 31 BC).
[40] Gradually, some Hebrews began to adopt the idea of Heaven as the eternal home of the righteous dead.[40]
Wright and Sanders are excellent historians but this is standard historicity.