"...throughout history (from scientific data), CO2 ppm in the atmosphere never exceeded 300 ppm. NEVER."

Wrong. It has been higher, in fact lots higher, for much of earth's history. Here is a graph, including the concurrent temperatures, which you will see have little correlation.

https://wattsupwiththat.files.wordpress.com/2013/06/co2_temperature_historical.png

And that does not mean I don't think it is a greenhouse gas or the greenhouse effect does not exist. Stop making up what you want to believe I think so you can try to make me look crazy, and stop making up scientific fact. It makes you look desperate and lacking of any real argument or expertise.