Those mature in their faith and fully grounded in God’s word have learned that God has charged us to proclaim what he said – debating it, is more for the apolegeticist than for the prophets.
We need not to worry, the message is for the believer and the un-believer alike, with no discrimination.
Having said that, it compels us to emphasize that what is found in Mark’s gospel (Mk 9:42) about children is not just a warning, it is a promise. The promise is, that if you pick a fight with God – you will most assuredly, miserably lose.