1. Many in Jesus' day already thought Jesus was John the Baptist resurrected, so they clearly did have a concept of a single person dying and rising before the eschaton.
2. There was a lot of historical precedence for the idea from surrounding culture (stories of dying and rising gods that go back many centuries B.C., contrary to what the apologists reiterate ad nauseum).
Unfortunately, Exbrainer left out the conclusion. So let's complete his argument:
3. Ergo, many in Jesus' day thought that John the Baptist was a god.
Or did they? Hmm...