I disagree. I think its exactly what the founding fathers intended. A segment of our country wants to keep mixing religion with politics, whether its calling America a "Christian nation", changing textbooks in our schools to fit a particular belief system, putting up displays in government buildings, legislating against gay people, limiting employees' health care options, the list goes on and on and on. What they don't seem to realize is that not everyone thinks like they do, and all of this stuff alienates other segments of our country. Segments that are growing and growing and growing. The solution is secularism. And, that's exactly what the founding fathers wanted.
Freedom of religion goes hand-in-hand with freedom from religion.
My personal feeling is that the Constitution intended to make sure that there was no "state sponsored" religion that people were forced to follow. That's significantly different than suggesting one can't use their beliefs to change how this country works (regardless of if they came to that belief through religion or some other means). I get that people choose to be offended by things like putting the 10 Commandments up in a court room etc, but let's face it all but two of those commandments are strongly practiced by most people in the world. If they were listed as "golden rules" or framed in some fashion outside of religion, no one would have an issue with them being up. That's for a different thread though.
The bold is true of every single person in this country and would continue to be true if religion didn't exist. Something's happened in this country and self awareness seems to be at an all time low. There isn't a substantive issue in existence where people will unanimously agree. Is there a significant difference between the person that has come to the conclusion that X is good/bad through religion vs the person that comes to the conclusion that X is good/bad through some other means? I suggest there isn't. I do agree that it's lazy to say "I don't want X because the Bible tells me I shouldn't want X" but is it really any less lazy than a person saying "so and so doesn't like it, and I agree with them on most things, so I'm not going to like it"?
I do acknowledge that some religious people have run amuck and become incredibly lazy when it comes to the state of our country and gov't. On the other side of that laziness coin lies the person who opposes them simply because they allow (at least in part) their religion to form their opinion. Religion's theology will never work in the politics of this country. They are coming from two completely different places and that IMO is why things are so screwed up and why more and more people are getting disenfranchised with both the Dems and GOP.
We have countless threads on the topics you listed as problematic because of religion. I would ask you to entertain the notion that these aren't problems because of religion, rather they are problems because of bigots, racists, fearful people who don't like the topics and are using whatever they can to justify their positions. Throw on top of that the terrible decisions to legislate "rights" in the tax code, insurance laws etc and you have a ####storm of epic proportions.