"Going into effect late last month, a city ordinance bans the burkini as well as any swimwear that 'ostentatiously displays religious affiliation, when France ... [is] the target of terrorist attacks.'"
The covering up of the body counts as an ostentatious display. It's not an ostentatious display of the body — go right ahead and do that — it's an ostentatious display of your mind.
What's the ugliest part of your body? I think it's your mind.