Today the radicalization of religion (all religions) is one of the most fearsome threats to our civilization. Of course government shouldn’t be mixed up with religion. That was one of the basic ideas that the US was founded on – sadly though much of that has disappeared, however, religion is always difficult, the US being not an exception. The US is indeed very secular if you compare certain features with for instance my home country Sweden. In Sweden we celebrate commencement in churches and I know that is common practice in most European schools. In a public school in the US that would be totally unthinkable. In other cases the situation is of course the opposite (again it is always complicated with religion in the picture). Another thing that is important to remember is that it is not only the Christian “right” that is a problem but also the Christian “left”.
There are just a minority who do that though, and I don’t think you should be criticizing all of those who are criticizing Islam for being a dangerous religion that has the end aim of a fascist state (Khalifah). Sure thing, Christianity is a huge problem, especially when we talk about different aspects such as for the gay community etc., but Islam is different in the way that it is the religion that is describing the most clearly HOW a state ought to be run (again, remember what you said in your opening). This makes Islam special, maybe not less of a threat for some (those of us, e.g. myself, who are concerned about gay rights etc.) that Christianity is, but just different because of the obvious reason that it is totally not practicable together with democracy.
Again, of course every person who wants to believe in this should have the right to practice their faith, but what about if the faith infringes basic human rights. Do we have the right to stop Muslim immigrants from Somalia from raising their children the way they want? Should female circumcision (excision) be allowed? Veiling a 10 year old?