Conversation so far:
Who did John F. Kennedy Jr.'s mom get married to?
Jacqueline Kennedy married Greek shipping tycoon Aristotle Onassis.
When did John F. Kennedy Jr.'s mom get remarried?
In 1968, Jacqueline Kennedy married Aristotle Onassis.
How did John F. Kennedy Jr. react to his mother's new marriage?
John F. Kennedy Jr. is said to have considered his stepfather a joke.
Why did John F. Kennedy Jr. think Aristotle Onassis was a joke?

Question: What did other people think of his mother's remarriage?
Self-contained rewrite: What did other people think of John F. Kennedy Jr.'s mother's remarriage?