I believe it was in John when Jesus said of those ready to stone a woman sinner."those without sin be the first to cast a stone" and 1 by 1 they just walked out and Jesus told her to walk away from her sins. 
And this radio-host surely has his own sins. He should put his stones down, as Jesus says a lot about poisoning a youth's mind. He has no right to take that wonderment and belief from kids. It's that same wonderment that brings people to faith.