But France is a secular country, while Britain (which seems to surpise some people who think it is) is Christian - our royalty not losing its heads in a revolution and remaining at least titular heads and guardians of (Protestant) Christianity through the C of E. Therefore, France has every right to demand its citizens and visitors to act in a secular, non-religious manner in public. The veil is, though, a lot of bosh. It's absolutely NOT a stipulation in the Koran or anywhere else. The origins appear to be in the court of Cyrus the Great in Persia, who decreed that his court ladies veil themselves - presumably so as not to inflame the lusts of even the court eunuchs. Thus, other ladies decided they wanted to look like high-born or court favourites, and the veil gradually gained in popularity.
All that the Koran requests is that women dress modestly and do not display their 'charms' in public. Obviously, long clothing was already a la mode 1500 years ago, so there was no need to tell women not to wear mini-skirts or halter tops, since they didn't exist outside of female gladiators in Roman times. Many Muslim women are making a lot of hoopla about wearing the veil or burka (which is like an all-in-one, as per Afghan women) - however, they are technically wrong about it being a requirement of Islam, because it isn't.
As for the Islamic centre, by all means have one to meet the needs of American Muslims, many of whom are white, homegrown boys and gals, but out of some sensitivity to Ground Zero, perhaps Manhattan isn't the most appropriate place for it. It'd be a bit like siting the Nuclear Energy Commission's HQ in Hiroshima.