They do realise that Hoyeol's original line, 'I don't believe in God because there is no hard evidence that they exist, but there is also no definitive proof that God does not exist.' and his changed manhwa line, 'Is your faith in the Goddess so shallow that you will break down in the face of an inferior demon's manipulations?' carry fundamentally different messages, right?
The former urges others to make their own judgment regarding the existence of Goddess, while the latter is a typical line uttered by cult leaders to guilt-trips people into doubting their own judgement.
Which also meant that in the manhwa, Talim and many of his subordinates' future character developments had been shot in the kneecap, because what Hoyeol said to them is no different than what the not-Freyja had been saying all along to curb their doubts.