You will need to explain that to the Samaritan Woman at the well.
He never even had a mission to get the non-Jews to follow the Ten Commandments which the B’nai Noach are supposed to do.
He didn't come that all would follow the Ten Commandments. He came to reconcile man with God. In doing so, it makes sense that these reconciled men would follow God's Law out of love for their Author.
Jews are supposed to love the non-Jew as well as his fellow Jew per the Eyn Sof.
The 10 Commandments is to be followed by the nations (who then become the B’nai Noach). The Jews are to follow all of Torah. Go talk to a rabbi. They’ll tell you the same thing.
What two commandments in the Torah rank as the greatest?
The Renegade Rabbi of deified fame pointed out the Hellenized one percenters Jews (aka the Sadducees), the rabbis (aka the Pharisees), a lawyer, and any of his talmidim (rabbinical students) who were present
Deuteronomy 6:5 “Love the LORD your God with all your heart and with all your soul and with all your strength.”
and
Leviticus 19:18 “Love your neighbor as yourself.”
as recorded in the Christian’s replacement Torah (aka The New Testament) in Matthew 22:36.
If you look at these two mitzvot (commandments) and then study the other 611 you’ll see that they are commentary essentially on those two.
So in a sense, when the non-Jews practice these two they are practicing all of Torah in an indirect way.
Rabbi Hillel the Elder
http://en.wikipedia.org/wiki/Hillel_the_Elder
is famous for saying something very similar.
‘In one story about them, a gentile comes to both and asks, with the obvious intention of provoking them, to be taught the whole Torah while standing on one leg. Shammai is indeed provoked and gives the man an angry whack with a measuring rod. Hillel replies, “That which is hateful to you, do not unto another: This is the whole Torah. The rest is commentary — [and now] go study.”’
http://forward.com/articles/14250/the-rest-of-the-rest-is-commentary-/
Not to mention the Roman Centurian.