I agree it's warming but unequivocally at an unprecedented rate is iffy. For the article they cherry picked a stable period but if you look at the full temperature history as shown here https://statmodeling.stat.columbia.edu/2014/05/05/can-make-b...
there has been loads of instability and heating and cooling.
Also while CO2 levels are up from about 280 ppm in 1600 to about 430 now, for most of the history of life on earth they were more in the 500 to 5000 range https://en.wikipedia.org/wiki/Carbon_dioxide_in_the_atmosphe...
I don't believe climate denial as in saying its not warming but I'm also skeptical of exaggerating the problem by ignoring most climate history. I guess the idea is to panic people into changing behaviour but it doesn't seem to work very well - co2 emissions are higher than ever and a lot of the population think we are doomed when we are not. Unbiased science is better in my opinion.