Real science has been questioning - and NOBODY has come up with ANY alternate explanation for the data. CO2 is a clear and obvious climate forcing factor.
>Data shows no direct correlation to CO2 levels and global temperatures.
Of course not. Data will also show no direct correlation between the height of the flame under a pot of water and the temperature of the water. The relationship is with the rate of warming, not with the temperature. And with a "water pot" the size of Earth, it takes centuries for temperatures to adjust to changes in "flame height".
>Data shows CO2 levels have been insanely higher in the past than they are now.
Yes, if you go back far enough. Like, many times longer than the existence of the human species. But when CO2 is high, Earth has always been a "hothouse", experiencing a radically different set of climate options than anything seen in the last 2.6 million years of ice age (we're only in an interglacial period now - we've still got polar ice caps). And the transition between ice age and hothouse causes a massive planet-wide extinction event lasting for thousands of years.
And no, Global Warming hasn't been debunked - it was even been confirmed by the researchers working directly for Exxon, etc., who decided to keep quiet and fund a massive disinformation campaign to preserve their business model instead. The shift to calling it "Climate Change" was because some people were incapable of understanding that just because the planet as a whole is warming, doesn't mean that every individual location will get warmer - changing weather patterns, like the polar vortex extending all the way down into the US, can easily cause localized cooling.