The author does not have any opinion about whether the people complaining about Klemke are biased or the cause of such bias. The author’s position is that if there is bias, that doesn’t prove the complaints are unfounded, which is why Klemke’s argument is flawed.

The author concludes that Klemke’s conclusion (that the complaints are unfounded) is false, merely on the grounds that Klemke’s argument in favor of it is flawed. Although Klemke’s support for his conclusion is inadequate, that doesn’t show his conclusion is wrong.

The author rejects Klemke’s argument, but not because Klemke is biased. The author does not claim that Klemke is biased or dismiss his argument because of his bias. (Klemke rejects others’ complaints because of alleged bias, but that’s not what the author does.)

The author’s argument is not based on a sample of opinions. It is based on the claim that Klemke’s argument is flawed.

Whether people are aware of disagreement has no bearing on the author’s reasoning. The author argued that because Klemke’s argument is flawed, Klemke’s conclusion is false. Disagreement or awareness of disagreement doesn’t relate to the author’s reasoning.