We in the US deplore any religion, cult or politician who says that women, or blacks, or gay are not equal. Ergo, a hijab worn by a Moslem girl identifies her as only 2/3rds a human being and not equal to a man according to the Koran and the Hadditha. Therefore, the hijab is not American, its a form of hate speech of women by Islam.
I do not believe there is widespread public support for banning the use of head scarves, in particular the head scarves worn by women in Islam. Even though France's Prime Minister imposed a ban on the full attire that Muslim Women wear (known as the burqa), many countries around the world received the banning with increased negativity toward France. They supported the Muslim women who decide to safeguard themselves and the sight of others in public. Also, banning the head scarves would ultimately ban the use of any attire worn above the head, as the Muslim hijab works to safeguard the hair of a woman from the climate of the weather; this is also true for many beanies that Americans wear when it's cold.
There is no reason to ban head scarves. The scarves are part of the religion and culture in the Muslim community. The wearing of the scarves cause no harm to anyone. If someone does not like the wearing of the scarves they should avoid their local Mosque. What the Muslims choose to wear is not the business of anyone else.