There are no (or NOAA) "whistle blowers". If you are attempting to clone John Bates, keep in mind that when interviewed, he stated that there was, "no data tampering, no data changing, nothing malicious."

You are conflating entities that maintain and process temperature records with the modeling community. I suspect that your confused complaint is with the former, and lies specifically with the necessary adjustments that must be made to raw data. You should understand that global, unadjusted anomalies show a greater warming trend than that of the adjusted. If scientists are trying to cook the books, they're not doing a very good job.

No one "chose" CO₂. It is simply the most radiatively impactful "greenhouse" gas. This has been known for about 150 years...but evidently, not by you.