Attributing global climate change to human CO₂ production is akin to trying to diagnose an automotive problem by ignoring the engine (analogous to the Sun in the climate system) and the transmission (water vapour) and instead focusing entirely, not on one nut on a rear wheel (which would be analogous to total CO2) but on one thread on that nut, which represents the human contribution.
Perhaps the greatest scientific deception of the IPCC is the abuse and misuse of computer climate models. They allow them to make their reports and deliberations appear credible. They allow them to bamboozle the public because computer models are a complete mystery to most people.
