lol. Where do you get your information from? A headscarf and the next thing you know, "radical Islam"?? Whatever. This is just xenophobia with a polite package. Many muslims wear a headscarf around the world. Other religions do to: It was, until fairly recently, common in Europe as well for many folks (not sure if it was ever common in the Americas). This isn't showing support for "radical islam" any more than being Christian is supporting radical christianity or being any religion shows support for the most radical versions of it. Most muslims simply follow Islam, and not a radical form of it. Radical is.. rare. In pretty much all things.
And no, it isn't an issue because it is a nation. There are lots of ways to have a common bond or culture. It is an issue because segments of the population have decided to be xenophobic and shun parts of this particular religion. You can have things like belief that everyone is equal as a common bond. Language is a common bond. Education can be (and is!) a common bond. Compassion can be a common bond. But this is the hill you are dying on instead.
I think your view of the world is very naive.
You can't inject political Islam in the French secular-with-deep-Christian-roots culture for the same reason you can't inject San Francisco LGBT culture in Baghdad.
Peoples and nations have histories, cultures, roots. You can't just copy/paste people around and expect everyone to be happy. The world has never worked this way.
And no, it isn't an issue because it is a nation. There are lots of ways to have a common bond or culture. It is an issue because segments of the population have decided to be xenophobic and shun parts of this particular religion. You can have things like belief that everyone is equal as a common bond. Language is a common bond. Education can be (and is!) a common bond. Compassion can be a common bond. But this is the hill you are dying on instead.