Conversation so far:
what was Jonah's post-biblical views?
Jonah is regarded as a saint by a number of Christian denominations.
why was he regarded as a saint?
His feast day in the Roman Catholic Church is on 21 September, according to the Martyrologium Romanum.
Are there any other interesting aspects about this article?
In Catholicism, the Book of Jonah is also read aloud in its entirety on Maundy Thursday in a Beneventan chant.

Question: what else was special about his views?
Self-contained rewrite: What else was special about Jonah's views aside from being regarded as a saint?