Why am I not surprised? We are supposed to be oh so tolerant of a religion that condones terrorism and espouses hatred of all 'infidels,' but we should show no tolerance toward the religion of 90% of the American people. This is typical leftist politically correct s&$t. You should get your parents to raise holy hell about it.
90%? What faith is that, the almighty dollar?
About 76% of the US is Christian, not 90%.
That said, allowing displays of one faith but not others seems completely inappropriate. Looking at
one school in the district (the one that gave the most relevent detail when I searched the district for "Muslim", they do appear to have both Christian and Muslim clubs - but if they are favoring one over the other that is completely unacceptable.
Or we could do the leftist thing like Dazzleman suggests and ban all references to all religions, as all faiths have their extreme and violent elements (which usually subscribe to some idea like kill em all and let God sort them out or somesuch).