Just a thought: to believe in truth is immediately to believe in falsehood. Any philosophy/religion that espouses truth immediately segregates all beliefs or fundamentals into true and false. To eliminate falsehood you have to eliminate truth, and you arrive at relativism. This is the prevailing philosophy in Europe and (I believe, but I apologize if I'm wrong) the American left. A bit of that philosophy enfuses any modern western mentality. Differences between beliefs become classified as differences in perspective, culture, upbringing, personality...the differences remain but they are now just that - differences.
One concept of freedom is the freedom to be whoever/whatever you desire without any strife or struggle about it. This concept cannot exist alongside falsehood, because if there is falsehood, there are certain things that people will disagree with. If what you want to be is wrong in some people's opinion, you will have to bear the weight of their disapproval. Thus, these people do not feel perfectly "free", they are in conflict with other people. So they abolish absolute truth in order to abolish falsehood, and thus be "free".
Other people start from the concept of truth - they believe that there are things that are true, or good, or right, and therefore there are other thigns that are false, or evil, or wrong. Christians fall into this category; Jesus says "no one gets to the Father but by me" and other things, stating that there is only one way to heaven, only one way to survive Judgment (namely, by accepting the fact that we need a savior since we have broken the law, and then accepting that Jesus is the only one with the authority to save us). If there is only one way to get to heaven, then there are lots of ways that don't get to heaven.
Bear with me, I'm bringing it around to the point -
So, for a Christian who believes that to say to someone "You need Jesus and this other stuff is wrong" is no more oppressive or intolerant than a doctor who says "you have an infection and you need antibiotics, your daily vitamins aren't going to make this go away." It's simply the way things are.
Now, for the Christian to force Jesus (a la the Inquisition) or for the doctor to force antibiotics down your throat IS oppressive. It isn't the doctor's decision whether or not you want to get better. He's just there to give his best judgment of the situation and use his knowledge to help you if you want it. I realize that a doctor is more trusted than a Christian today, but for a Christian who believes the bible, he acts from the same perspective as the doctor. It's just not heard from the same perspective.
Continuing with the example, Christians will always believe that some things are wrong and will say so, explicitly or implicitly by their actions. Parties like the ACLU that believe that first version of freedom (that you can be what you want *without* disapproval) will therefore see Christianity as opposing freedom, and will restrict a Christian's ability to live according to their beliefs - all they have accomlished is lifting disapproval from themselves and oppressing a different group.
That's because that vision of freedom is flawed. Freedom is being able to be what you want *despite* disapproval. Allowing Christians to pray before they play in a game will naturally make some people feel denounced and excluded. Putting a Christians into a science class teaching evolution will make them feel denounced and excluded. It is a consequence of freedom, it's something we all have to deal with.
I'm tired of special interest groups telling other special interest groups "you can't make me feel bad, you need to celebrate me." Back to the Christianity example, if the Christian believes that making another group feel bad is the *only* way to save them, by all means make them feel bad. If the scientist believes the Christian is a fool and blinding people to truth, by all means make him feel bad. Just don't force any decision on them. That is what freedom is about. Even though someone thinks I'm wrong, I don't have to change.
And that's why I get upset (finally relating the principle to what JediSage has been talking about) when groups limit Christians' right to express themselves. They are preventing Christians from living how they want so that they don't feel bad. And, to be fair, there are times that Christians go too far as well and limit other groups' ability to act. That isn't the example that Jesus set - when the rich young ruler didn't want none of it, Jesus let him walk away. The Christian role is to tirelessly, relentlessly express and live our beliefs and welcome anyone who chooses Jesus, not to choose Jesus for them. That choice happens between God and that person.
But this nation was founded on Christianity, so as it grows increasingly non-Christian it will face the backlash as people revolt against the Christian values inherent in the system and the culture.
Bottom line - groups shouldn't fight other groups because they feel bad, they should only fight when they are forced to become something they don't want to be. Just because someone is praying on your campus or a teacher said Christianity is wrong doesn't mean your rights are being threatened.