The point is that they systematically tried and succeeded to create doubt about climate change, when they knew well, that climate heating is happening. They act

The point is that they systematically tried and succeeded to create doubt about climate change, when they knew well, that climate heating is happening. They actively mislead many people, who would rather grasp for the comfortable alternative lies than face the reality. They actively spent and did spend huge amounts of money to influence politicians to tell their "there is no climate change" or " it is all natural and normal" or "this would have happened even without humans" naratives.