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Steve in Dallas: (paraphrased) "I've lived through a bunch of 'chicken little' scares, and global warming is just another one of them!"
So if some small factions of scientists have been wrong about theories in the past, therefore larger factions of scientists should be considered wrong about current theories? That seems to be your argument here.
Note that your argument is based on nothing other than "welp, somebody got it wrong before, so how can I trust 'em to get it right now?" Your argument is not based on your own assessment of the evidence and arguments.
Worse yet, your argument ignores all the instances in which scientists' theories were correct, and in which those correct theories were then built upon and strengthened, turning into conventional wisdom. You don't remember those times because they weren't as dramatic and interesting to you.
Basically your entire argument is based on confirmation bias and a resistance to the challenges of higher thought.