In reply to a question of whether the Jews have heard or understood about Christ, I would say that, as is supported by the Scriptures, they have heard it and should have understood it, because even non-Jews, who were not searching for God, understood it.

Romans 10:18-21

18 But if someone were to ask, “Have not the people of Israel heard the message about God?” I would reply that they certainly have heard it! It is like what is written in the Psalms,

People living all over the world [PRS, MTY] have seen the stars, and what they indicate about God’s character has reached people living in the most remote places in the world [DOU]!

19 But someone might ask, “Is it true that the people of [MTY] Israel understood the message about Christ?” I would reply that certainly they understood it, but they rejected it! Remember that Moses was the first one who warned the people of Israel about disobeying God. He told them that God said,

You consider that non-Jewish groups are not nations at all [CHI]. But some of them will believe in me, and I will bless them. Then you will envy them. I will cause you to be angry with those people whom you Jews think do not understand my ways [IRO].

20 Remember also what God said very boldly to Isaiah:

Non-Jews who did not ◄try to know/seek► me will surely find me [DOU]!

I will surely reveal what I am like to those who did not ask for me!

21 But concerning the people of Israel, Isaiah tells us that God said:

For a long time I have held out my arms to people who disobeyed and rebelled against me, in order to invite them to return to me.