What you’ve done is cherry picked one source, ignore those linked, and even ignored the statements of the source you chose. Calling the IPCC the “authoritative source” on climate demonstrates a lacking understanding of how scientific research is conducted. But that said, on their front page, IPCC has a report which acknowledges 1.5 degrees of warming has already been reached. Add the 1.6 degree warming which your mathematics provided, and we have warming of 3.1 degrees above pre-industrial levels. Once again, the last ice age was just 2 degrees cooler than the pre-industrial average. That kind of warming will be catastrophic.
I have provided more than enough information to dismiss your attack, and even gone as far as to directly address your own flawed research. If that does not convince you, I fear nothing will.
For someone who claims to be a data driven conservative, you seem to lack and understanding of both data and conservation.