Proverbs 23:9

Don’t waste your breath on fools, for they will despise the wisest advice.

It is so tempting and easy, and pointless, to argue with people who have no intention of listening to you.

Luke 10:13-15

Some people we may think evil or immoral will actually receive less judgment than those who are seemingly pious, yet in their hearts, reject God thru Jesus.

It seems Jesus is saying that the more that is revealed to you, the more that is expected of you.  Or something like that.  The more of the truth of Christ you hear, the more opportunity you are given to turn to Him, and the more you reject Him and His offer…the worse it will be for you.

Perhaps here He is answering, to some degree at least, that very common question–“What about people on a remote island who have never heard the name ‘Jesus’?”