You don't have to get every climate scientist to be in on the conspiracy when you have every major news outlet claiming there is a 98% consensus among climate scientists and that the science is settled.  Nobody can show you the proof of 98% consensus.  We are just supposed to agree.  The news outlets are just parrots and repeat what propaganda they are told.  At this point people don't even question and that's an indication that the propaganda has succeeded.  I may not be a scientist, but I do know that there have been VERY EXTREME climate changes in the 4.6 billion years this planet has existed and in the majority of those 4.6 billion years, man did not exist.  These are natural cycles and I'm sure they still exist.  Does man have an effect on these natural cycles?  Maybe.  If so, to what extent?  Those questions are NOT settled.  Anyone who tells you they know how much of climate change is due to natural cycles and how much is man made is lying to you.  It's that simple.