Musing...
I think one of the reasons that the science community largely ignores or shouts down people who are bringing in "evidence" that climate change and global warming is not manmade, is that the evidence being brought in is the same evidence that was brought in hundreds of times before and has already been tested over and over to the point that it is considered junk science.
It is not silencing dissenters, it is reading a copied term paper for the 10th time with someone else's name on it.