The problem with labeling islam as a religion is that it gives islam a soft and fluffy facade. Just look at the moronic Catholic Charities that spend money, goodwill and time to spread islam to all four corners.
If the truth of islam and its evil and vile method of forcing itself upon others were advertised more, then most people would not accept spreading it around.
There is nothing good about islam unless you are a horny male and/or like to harm others.
I have said that Islam is not a religion for a long time. Until we refuse to accept Islam as a religion, when it is a socio-political system disguised as one, it is protected by our first amendment like any other.