Ignorant debate remains ignorant
Debate may be a real thrill and a great manifestation of public discourse, but that doesn't mean it is always sane.
Part of the reason for this particular "debate" is the result of truly depressing levels of outright scientific illiteracy - a total failure in many people's comprehension of what the whole scientific modernity thing means.
We have collectively funded through taxes and whatnot, a truly gargantuan enterprise that we can loosely call "modern science", and it deals with matters of fact about the natural world and uses tools and methods matured over hundreds of years. It is the same enterprise that can put a probe on a planet millions of miles away, or has electron microscopy of things millions of times smaller than we can see with our eyes.
To this behemoth, we give the job of telling us what nature is up to, and it delves nature in mind-numbing detail, utilizing tens of thousands of highly trained people across the globe over decades.
It has peer-review processes that role up into a publication method, that itself rolls up into colloquia and panels and boards, etc., and finally at the global level, it occasionally spits up the best assimilation and synthesis of all that work as a consensus position.
By the time you get to a consensus declaration that tells you what the current or new default position is (and therefore the dominant theory against which all comers will be judged) it has done a level of work and integration that no other group or institution can rival.
The consensus position is always going to be the very best guess mankind can have to offer on any matter of the natural world, simply because to come up with a plausible alternative, one would have to mount a program of inquiry that approximates the effort that modern science has put into it.
The question has been as conclusively answered as the species can - and the answer is clear and published: the planet is warming, our activities are a significant cause, and we have an approximation of the quantity and rate.
Science has delivered an answer, and unless one can field an alternative to science, this is the best possible guess that our entire species is able to make.