A possible reading. Or Luke could be accenting the idea of mercy.
Do you remember the story of the woman at the well?
John 4: 9 Then saith the woman of Samaria unto him, How is it that thou, being a Jew, askest drink of me, which am a woman of Samaria? for the Jews have no dealings with the Samaritans.
From the Babylonian Talmud.
Mar Zutra, according to others Mar Uqba, said: "Originally the Torah was given to Israel in Hebrew characters and in the Hebrew language; the second time it was given to Israel in Ezra's time, but in Assyrian characters and in the Aramaic language; finally the Assyrian characters and the Hebrew language were selected for Israel, and the Hebrew characters and the Aramaic language were left to the Hediotim (Idiots). Who are meant by Idiots? Said R. Hisda: The Samaritans. What is meant by Hebrew characters? Said R. Hisda: The Libnuah characters.
Another quote demonstrating the Jews attitude towards the Samaritans.
Cattle must not be placed in the inns of the heathens. (See foot-note, p. 41.) "And
the cows went straight forward," etc. What does this expression mean? It reads (Jos. x. 13): "And the sun stood still, written in the book of Yasher." What is the book of Yasher? One must not stay alone even with two women. If an Israelite while on the road, happened to be accompanied by a heathen, etc, One must not confine a heathen because she brought up a person to idolatry, etc. A city in which there is no Jewish physician, but a Samaritan and a heathen, the heathen shall circumcise and not the Samaritan.
And another.
"Put not a bath-house," etc. There is a Boraitha: R. Simeon b. Gimalia said: One must not rent his bath-house to a heathen because the bath is named after the owner and the heathen does his labor on Sabbath and holidays (and people may think that the Israelites themselves do this). But how is it to a Samaritan? It may be rented, although he works on the minor festivals? On minor festivals, we Israelites also are permitted to heat baths. But let us see why it is permitted to rent a field to a heathen, although he does labor on Sabbath? Because people know that the gardener is doing work for himself. Why not say the same concerning a bath-house? It is because usually a field is hired to a gardener, which is not the case with bathhouses. There is another Boraitha: R. Simeon b. Eliezar: One must not rent his field to a Samaritan because it is named after him, and the Samaritan works the field during the minor festivals. But how is it with a heathen? It is allowed, because people know that he does it for himself; why not say the same concerning a Samaritan? R. Simeon b. Eliezar does not consider the reason of a gardener at all, and his reason why it is allowed to a heathen is that if we tell him that be should not work, he will listen to, which is not the case with a Samaritan, who thinks that he knows better than we do.
This demonstrates the attitudes the Jews had towards the Samaritans. Who were the Samaritans? Descendants of the 10 tribes of Israel. Samaria was the capital of the northern kingdom. They were the people who gave the Jews a bad time when rebuilding the walls of Jerusalem after the captivity of Babylon.
Ezra 4: 1 But it came to pass, that when Sanballat heard that we builded the wall, he was wroth, and took great indignation, and mocked the Jews.
2 And he spake before his brethren and the army of Samaria, and said, What do these feeble Jews? will they fortify themselves? will they sacrifice? will they make an end in a day? will they revive the stones out of the heaps of the rubbish which are burned?