how can any one religion make a valid claim to be the fundamental truth?

What is the "fundamental" truth about Christmas?

Which is fair enough I guess as the Christians had borrowed it off the pagans in the first place.

OK so its IS the truth. PROVE IT.

If you can’t or are unwilling to do so then also do us the courtesy of not claiming your beliefs to be THE truth

What is the truth that is inside me? And also tell me why you believe it to be true.

The bible is the guide to finding the truth. If you learn it from the wrong source, or do not take the time to understand the whole thing, and then make the comparison to real life, then you are short changing yourself, and will never have all the pieces of the puzzle, to see the final picture.

Andy Boenau writes: MORAL RELATIVISM
The most crucial component to the debate is moral relativism. Sadly, it is also the component that is quickly dismissed. To establish an argument involving moral relativism requires one to make an absolute statement of belief, which in itself conflicts with the notion of relativism. Relative and Absolute do not associate with each other. Let me introduce two of my imaginary friends: Bill, the moral relativist, and Bob, the moral absolutist.Bill cannot logically insist that Bob’s moral beliefs are too strict, or outdated, or intolerant since Bill believes that moral standards change based on society’s feelings at any given time. His belief system defines Bob’s morals as acceptable. The idea that society’s general opinion overrides certain established morals over time is also flawed. If that held true, moral relativism would have transformed into moral absolutism and therefore torn apart the fabric of the space-time continuum.Moral relativism requires the believer to accept all definitions of morality throughout all time. An argument can never be made that one is superior to another.Bob has an unchanging source for his morals, making them absolute. He can therefore, based on his source, argue that one set of morals is superior to another. Other absolutists may base their morals on another unchanging source, and therefore, will disagree with Bob on occasion. The Bible and the Koran are both written documents and neither is altered over time. So, a person who bases their morals absolutely on the Bible will tend to disagree with the morals of Osama bin Laden.We have all heard the horrors that have been uncovered with the removal of the Taliban in Afghanistan and Sadaam Hussein in Iraq. Bill has no basis for complaining about torture chambers, rape rooms, and the general dismissal of women in Muslim countries. The society in Afghanistan holds to morals that most Americans find reprehensible, but based on moral relativism, Americans have no right to interfere. That idea presents a dilemma for national defense. If the morals of the terrorists onboard the planes on September 11th are to be held as acceptable, then we as a country have no right to do anything to interfere with those beliefs. Moral ideas of self-preservation or the greater good are meaningless. To say otherwise would be to attach an absolute to morals.Bob, the moral absolutist, may not share the same beliefs as others around the globe, but he can logically argue the merits of one belief system over another. Sadly, he may only argue with other moral absolutists since absolute statements made by moral relativists are irrelevant.
Moral relativism erodes the foundation of law and will lead to anarchy. Any behavior is acceptable and welcome.Law must be based on absolute principles. We can debate until the end of time exactly which principles it should be based on, but to base law on nothing is to have no law.