Do these scientists also say that the atmospheric pollution is beneficial for the planet?
Increasing the number of people who reinforce a paradigm only makes life harder for those who seek better explanations. Imagine increasing the number of builders who prove with their gadgets that Earth is flat and who keep bulldozing their building sites to make them flat to high accuracy.
A theory of Santa Claus won't become true just because millions of children are mislead to believe in it. "Not appearances, but what is BEHIND them is the most important"
You are correct in suspecting that there is a natural process behind the forthcoming global trouble. This process relates to naturally occurring planetary/stellar "thermal cycles". In stars called "pulsars" these cycles are shorter than 1 second (>25 ms) (these pulsations are NOT due to spin of pulsars, as most astrophysicists believe!). The thermal cycle of our Sun is approximately 11 years long. For planets such as Earth the duration of thermal cycles is many thousands or even millions of years. Appendix 5 to this article explains why the planetary/stellar thermal cycles are inevitable.
Nature in its entirety is designed to be self-correcting. The chemical composition of the atmosphere normally corresponds to the stage of the planetary thermal cycle. When the planetary interior is colder, the atmosphere with higher CO2 content traps more Solar heat and the planet warms up. When the planetary interior is too hot (volcanic eruptions increase), the atmosphere should contain less CO2 so that the interior can cool down.
The presence of our arrogant, super-polluting "civilization" greatly disturbs the natural thermal cycle. CO2 and pollution levels are several times higher than they should be... Instead of cooling down, the planetary core warms up. The evidence is clear: volcanic activity increases, all glaciers including polar ice caps melt. The heat clearly comes from UNDERNEATH.