No the ice core records show that the level of co2 FOLLOWS temperature change not the other way round
First, a major correction for you. The ice core studies show that CO2 levels do lag temperature changes. They
do not in any way show "not the other way around". This is a common mistake, thinking that by proving A causes B, you have somehow proved that B does not cause A. There is quite a bit of evidence and study which shows that in fact high CO2 can cause higher surface temperatures. Part of the issue centers around the fact that our current CO2 levels are about 133% of the high point over the past 420,000 years per the Vostok samples, and for much longer than that per other studies.
You should be clear that ice core samples only extend back about 800,000 years, and data predating that are from othere methods.
During this time period, and extending back about 20 million years (via geochemical testing), CO2 has been relatively stable at levels below 300 ppmv. CO2 levels before this time were much higher, but the entire atmosphere was different, and plants were different in major ways as well. (Mainly in C3 vs. C4 fixation.) If you want to look at the conditions of earth beyond about 20 million years ago, you have to somehow account for the huge differences in atmoshpere and biosphere. Sure, 300 million years ago the CO2 levels might have been 6000 ppmv, but what does that mean to us today?
The rest of the article you quoted was pretty much random rambling, with points that if taken one-by-one are easily refuted as I have shown, or completely irrelevant to any discussion about the effects of CO2 on climate.