Not unity specifically. Excellence, Respect and Friendship without discrimination. Technically "unity" is not a core mission statement and what is considered culturally significant is left to the host country to decide.
Is a fashion show featuring people dressed to reference Greek Gods off brand for the French?Not really. Historically speaking the Nobility used to employ people to dress up to become Greek gods in tableau to serve as living lawn ornements.
The original Olympics, both the ancient practice and the og international competition used to also feature arts and culture. Since the painting they were referencing was not the Last Supper and about Greek Gods it wasn't an intended act of disrespect or division ... But other forces are definitely choosing to make it so based on the idea that these things should be of the broadest possible appeal.