Well one of the strangest in OTL was demonstrated in Terry Pratchett's Discworld novels where the nature of the world, a flat earth mounted on 4 elephants which in turn stood on a giant turtle was based on an real life religion IIRC.
I'm not sure there was a WTF reaction from the Jews, just the view that Jesus was a prophet but not the final Messiah as he claimed. It was only later with a clear break from Judaism - starting with Paul's changes to its practices - that Christianity really diverged from its predecessor.
Similarly with the Romans they were generally tolerant of all sort of faiths and had experience of monotheistic faiths with the Jews and the Zoroastrianisms albeit that the latter was generally associated with their great enemies in Persia. It was only later as the empire started to falter that there was real religious conflict.
I'm not sure there was a WTF reaction from the Jews, just the view that Jesus was a prophet but not the final Messiah as he claimed. It was only later with a clear break from Judaism - starting with Paul's changes to its practices - that Christianity really diverged from its predecessor.
Similarly with the Romans they were generally tolerant of all sort of faiths and had experience of monotheistic faiths with the Jews and the Zoroastrianisms albeit that the latter was generally associated with their great enemies in Persia. It was only later as the empire started to falter that there was real religious conflict.