If the processes of science were better understood these tangential discussions would be viewed as useless as the theological discussions of how many angles can dance on the head of a pin.
The basics of climate science have been a working hypothesis for many areas for decades.  We are seeing environmental changes and the only consistent hypothesis that allows prediction and explanation relates to factors involved climate science. Something like climate has always changed is useless unless there is mechanism to predict future changes and explain past ones.
If someone is studying how plants and insects are moving up a mountain using result from climate science explains past movement and predicts new movement. Climate science is not an isolated study but is crosschecked and modified based on interaction with all the areas of science. Ocean acidification and the rise of mercury are checks that fit observations.
Attempts to discredit a part are an attempt to discredit science.