Here are some movies that you'd think would be Jewish in theme or content based on their titles but are far from it. (* means it stars Arnold Schwarzenegger.)
Tora! Tora! Tora!
What it should be about: The Torah (three times?)
What it is about: The Japanese attack on Pearl Harbor (The title is a Japanese code word)
The 6th Day*
What it should be about: The creation of humans
What it is about: The creation of clones
All About Eve
What it should be about: The first mother
What it is about: Backstage backstabbing
Cain and Abel
What it should be about: The original sibling rivalry
What it is about: Undercover cops in Hollywood
Book of Ruth
What it should be about: The convert, Ruth, and her loyalty to her mother-in-law
What it is about: A Mexican immigrant on a quest for love
Mortdecai
What it should be about: The Book of Esther
What it is about: An art dealer trying to recover a stolen painting that has a clue to lost gold
Proverbs
What it should be about: The collected, pithy wisdom of King Solomon
What it is about:The Zoloft Defense
("My meds made me do it")
Song of Songs
What it should be about: The collected, NFSW love poetry of King Solomon
What it is about: A woman falling for a sculptor who can't commit
Jonah Hex
What it should be about: The bad luck that the Prophet Jonah brings on himself
What it is about: A wanted outlaw recruited to stop a supernatural threat
Judgement Day
What it should be about: Accounting for one's sins
What it is about: The only man who can stop an asteroid from hitting Earth
Day of Atonement
What it should be about: Yom Kippur
What it is about: The Feds trying to stop a mob war (part 2)
The Book of Life
What it should be about: Rosh Hashanah
What it is about: A troubadour who goes through hell, literally, for love (it's a kiddie movie)
Tabernacle 101
What it should be about: A beginner's guide to Sukkot
What it is about: People who try to disprove the existence of evil spirits, only to tick them off
Festival of Lights
What it should be about: Chanukah
What it is about: A woman's quest to find her long-lost father in Guyana
Sabbath
What it should be about: Shabbat
What it is about: …it's a really gross-looking, very poorly rated horror movie. Don't ask.
Holy Land
What it should be about: Israel
What it is about: A 20-something who is a musician but wants to write a novel
Promised Land
What it should be about: Israel
What it is about: A natural-gas company employee who questions his firm's ethics
Roman J. Israel, Esq.
What it should be about: A … Roman … lawyer … in Judea …?
What it is about: An idealistic attorney confronted with the 21st century justice system
Kingdom Come
What it should be about: The afterlife (in Hebrew: "Olam Ha'ba")
What it is about: A family trying, and failing, to be sad when a despised family member dies
End of Days*
What it should be about: The Messianic era
What it is about: A cop trying to stop The Devil from taking a human bride
Also, there are some TV shows that sound Jewish but are not:
Nu3bers
What it should be about: The fourth book of the Torah, or at least its first chapter
What it is about: A family of math geniuses solving crimes with math
Crossing Jordan
What it should be about: Joshua entering Israel following the death of Moses
What it is about: A crusading coroner solving crimes with science
Jericho
What it should be about: Joshua conquering Jericho after crossing the Jordan River
What it is about: Life in Colorado after Denver is nuked in World War III
What else is named for something Jewish, but isn't? Genesis … Exodus … Old Deuteronomy …
Let me know in the comments!