It seems to me a tad bit rude to ask someone why they don't capitalize and then criticize them for the answer given.
But the given answer didn't correspond with what he is doing - not capitalising 'I', because of the reason given in #28, but then he does it for all sentences.
The end result is: it shuts down the channel of communication, discourages diversity of membership here, and develops an echo chamber of like minded individuals instead. Is that what you want? It doesn't sound very good to me.
Well his apparent views on some simple science seems to show where he is coming from. Is that what you want - the same old stuff - rejecting science because it doesn't seem to accord with his religious beliefs.