Well, I just figured I'd pop in and give my two cents. I'm a spiritual atheist. I have some pretty far out there beliefs. Frankly, I think that it is the right of every individual to practice the beliefs that they desire in private, so long as it harms no one. I'll meditate and engage in my new age-y woo, and you can feel free to do whatever you like, and so long as we're not trying to hinder the other, I'd like to think that all of us can coexist. In fact, I would encourage a diversity of beliefs. A completely homogeneous society is never a good thing. I want people to have different beliefs than I do. We can debate and reason together. We'll have differing points of view. So long as things stay civil, they should be allowed in private.
As for public affairs, I do think that things should stay secular. I will not point fingers at any particular ideologies, as I am aware that the workings of a few nuts should not taint my view on the whole, but religion in our past has been responsible for some quite heinous crimes against humanity, as well as the denial of human rights to marginalized groups. I think that in public, we shouldn't allow religion. No public displays, no handing out religious texts, and so on. Feel free to have churches, temples, mosques, etc. as long as they don't disrupt the community, again, I actually would encourage this. I feel like a diverse culture is good, especially as a society that wishes to represent all of humanity. However, despite the benefits of a diverse culture, and the importance of free speech, I think that it is very important to make sure that religion stays out of government. People who are religious can feel free to partake in government affairs, they just need to make sure to keep their beliefs out of the picture and make decisions purely on logic and reason.
tl;dr: In private, everything should go, as long as you aren't infringing on the rights of others. In public, don't disrupt things, but feel free to gather in your places of religious meetings with pride. In terms of laws, human rights should always trump religious rights. So long as you don't force your beliefs on me, I won't force my beliefs onto you.