In his defence, just that abiogenesis sounds impossible to him doesn't necessarily mean that he has an alternative explanation.
When did asking "how do we know" become forbidden in science? Convention OoL is looking entirely too dogmatic and religious for my taste.
People are calling out Ezion for dogwhistling because of his writing style. Comments written in a glib manner, with superficial counterarguments presented as gotchas, that is suggestive of dogwhistling.