What did you make of his section on exactly the objections you are making?
Complete non-sense.
First there is a discussion of 'standard' and 'non standard' definitions of atheist - without any kind of clarity. However to me (and I suspect most self defining atheists here) the definition of atheism is a lack of belief in god or gods.
He goes further to indicate his lack of understanding, with a confusion with agnosticism - again many (if not most) atheists here are perfectly happy to be described as agnostic atheists - the agnostic part being that we do know 'know' that god or gods exist or don't exist - the atheist part being that we do not 'believe' they do. Perfectly compatible.
Then he makes the nonsense claim (purporting to use the 'non standard' definition of atheism) that there are the following attitudes toward proposition P:
Believing P
Believing non-P
Suspending judgment about P
Non of these apply to atheism - which is
Not believing P (completely different to believing non-P)
There is no evidential requirement for Not believing P - the onus of evidential requirement rest on those 'believing P'.
Imagine P is that invisible pink unicorns exist on the moon, do you really think there is any onus on someone 'not believing P' to provide any evidence to that effect - of course not, not least because you cannot prove the non-existence of something.