There is consensus....and then there is consensus. Evolution is a foundational tenet of science. It is not a par with your garden variety theory. It has been so thoroughly tested and probed with multiple lives of evidence over the course of more than a century, that is has been basically elevated to the vaunted status of a scientific tenet or law. While interesting questions remain, the basic outlines are firmly established.
Now, when wingnuts trot out this "consensus can be wrong!" argument, I can tell you exactly where that comes from: they have heard over the years that climate science consensus is wrong, because "science" used to think the sun went around the earth. Of course, the educated among us know that the pre-Coperincan view of the solar system was not based on the scientific method...it was based on religious dogma, speculation, and guesswork...which the scientific method and scientific consensus ultimately corrected.