"All across Europe, among right-wing circles, there is an increasing concern that high levels of immigration to Europe from Muslim countries will lead to an Islamisization of Europe, and these right-wingers are concerned about keeping their countries white, and vaguely/unobtrusively christian."
This point is weakened by the fact that the legislator who initiated the legislation to ban the public wearing of the niqab was not a member of the UMP, or even the PS, it was Andre Gerin, a French Communist. Furthermore, the move has broad support across the French population, not just among the French right. Anyway, I don't get what niqabs have to do with race. Do you have to wear a niqab to be black or Arab? The fact is that this issue hasn't just cropped up recently. Authorities in Britain, France and elsewhere originally thought the veil issue was marginal, but it has grown by leaps and bounds.
http://www.nytimes.com/2007/06/22/world/europe/22veil.html?_r=1&hp&oref=slogin
"seems like the law targets Islam. I understand the *principle* behind it, but if they want to be fair about their laïcité they need to make it apply to everyone across the board. If you can't wear religious imagery in public, then you can't. Doesn't matter what kind."
Crosses and yarmulkes don't threaten security, basic safety, and signify fundamentalism the way the full veil does. It's not as if Muslim countries don't also ban or restrict the wearing of the veil for the same reasons.
"Becoming? The French are one of the most proudly xenophobic nations in world history."
Name a country that isn't xenophobic.