Uh, no. It was made possible because some very intelligent and enlightened men decided to apply the principle of representative government, with enumerated rights, to it. Those came from the ancient Greeks and Romans, with help from the English Common Law.
" America was not given birth to by Budhism, animism, etc..."
No, it was given birth to by Reason. Christianity is not mentioned in either the DOE or the Constitution as a source.
"And if we all want to continue to be free people blessed with Constitutional rights found nowhere else in the world,including the right to worship, then all of us, no matter whether Budhist, Wiccan, or whatever, had better respect and protect the source of those freedoms......Christianity and God of the bible."
See above. Fortunately, there is no requirement whatsoever in law for anyone to bow down to YOUR religion, or you to bow to theirs. It's called "freedom". You theocrats should learn about it, it works pretty well.
Having a religious belief in magic, psychic power or mysticism is not religion.
You say that our founding fathers never mentioned Christianity, but they never mentioned cannibalism either.
Would you defend with the same zeal the "religious" beliefs of the ancient Aztecs as much as you defend the "religious" beliefs of ancient Europeans?