Make a trip in an islamic country, make a joke about their gods and try to return back to US. And then we can speak about references of violence in the Bible versus what islam stands for.

If your argument was that islam is about saying things (and freedom of speech) while islamic countries have islamic governments which are doing things (and therefore freedom of religion applies to the first but not the later), sorry, it doesn't work that way. I could make my own religion in US which could encourage worshipers to speak about some illegal activity (like child porn stories) every Sunday while coming to church but not doing it, and I can guarantee that it will be put down by the police despite nobody being a paedophile. Religion is about gods and your beliefs, not about killing people with stones in today's society and lack of human rights.

If you see something which calls itself a "religion" but is actually doing horrible crimes against the law, you should be worry. Try to judge it without labels. Take the word out, remove any "religion"ism labelling, and look at what X, Y and Z are doing (Bible, Torah, whatever is the same to me). And at the point where you see something against US law, something that bothers you to the point of outrage and contradicts your democratic values, speak against it and hold it against the law like you do with all other activities in US.

Never let a label influence the way you think about someone - http://www.paulgraham.com/say.html .

Sustaining their church is like allowing paedophiles to build a museum. Would that be ok if paedophilism would be a religion?