Faith is an excellent human trait, but having faith in something that can has been proven wrong through science and observation can hinder individual and societal growth.
The Big Bang Theory is the theory that the universe came about from an immense explosion billions of years ago. Sagan raised the possibility of an oscillating universe, where the Big Bang Theory was not only the beginning of the universe, but the end of another universe. This cycle could be repeating over and over. Scientists can only speculate. However observation has shown that the universe is expanding outward from each individual point in the universe. Radio, photographic, x-ray telescopic views have shown this expansion of the universe through the Doppler Effect. The Big Bang Theory was based on observation and scientific means. It was not meant to refute religion, or to be sacrilegious.
The Big Bang Theory is incompatible with religions that believe in Creationism. Judaism, Christianity, and Islam are based on Creationism. The basic tenants of Creationism are the story of God creating the Earth and man in six days. This even occurred four to five thousand years ago according to the religions steeped in Creationism. The Big Bang Theory is unacceptable due to the lack of God’s involvement and the purported age of the universe being billions of years old. The story of Adam and Eve in the Old Testament has been passed down in these Judeo-Christian religions. If that cornerstone is taken away, then other Torah, Biblical, and Qur’an stories might be dismissed. This frightens the fervently faithful. If Adam and Eve were not real people, then maybe a higher power does not exist. If God, Jesus, or Allah is not real, what have humans believed and died for eons? This will cause the truly faithful to avoid astronomy and scientific finds despite the proof of observation or other evidence.