Most of the things that you say are true but irrelevant in the context of the present discussion. Just as several scientific theories have been replaced by other scientific theories, several traditional beliefs have also been overthrown by modern science. For example, there was a time when it was believed that natural calamities are results of people's sins and God's displeasure, whereas today we have more proximate reasonings. Does this mean that God has been ruled out? Logically the answer is no. But if you want to say yes, then by this argument, all that you said about scientific theories being wrong and hence can not be relied upon, makes religious beliefs equally unreliable. Are you ready to accept that??
Again, what does the personal belief of a Nobel prize winner has to do with the existence of God? Science has neither proven nor disproven the existence of God and considers "HIM" to be outside the purview of scientific inquiry. Regarding Einstein, there is no doubt that he was a great thinker, but does that mean that there was no piece of scientific knowledge that was not known to him? Believe me, there are many things that a Standard 12 student knows today that Einstein himself would have had no clue at his time. Thus, just because Einstein has made a statement that mentions God, does not mean that all scientists should start believing that God exists. In fact, that is the precise anti-thesis to science- believing what somebody else says, on faith.
