well, not all scientists 'accept' the Big Bang theory,,,there are still 'steady state' adherents around, and those who think there may still be a 3rd or 4th possibility. And, it is important to note, not all who suggest the Big Bang as the current best guess really accept it in a srtict sense...they simply propose working hypotheses and see what experiments and discussion lead to...(This is my favorite way of approaching it all...I am quite uncomfortable with listening to those who get their egos mixed into their science (or religion!) and assert that they HAVE the answer..) (even worse is mixing ego, science and religion in the same pie...you get some strangly flavored products, with pie crust that falls apart with a sharp, logical knife.)

as to the Red Shift...measurements like that are constantly being re-evaluated. I assume that if new figures are discovered, there will be foot-dragging among those whose theories it upsets, but you can't "cover up" scientific facts for long if they are true. (Did you know that someone, on a whim, did a BIG survey and showed that 'normal' human body temperature is NOT 98.6° F?)...I suppose there is opposition to changing THAT by some, but they can't exactly cover it up.