What are some salient features to show God is merciful in particular to the Chosen people?

Answer 1

The revival of the Hebrew language and the land of Israel, and especially the continued existence of the Jews themselves despite 2,000 years of exile, is one of the world's major historical miracles. It is unprecedented. As Mark Twain famously said,

"If the statistics are right, the Jews constitute but one quarter of one percent of the human race. The Jew ought hardly to be heard of; but he is heard of, has always been heard of.

The Egyptians, the Babylonians and the Persians rose, filled the planet with sound and splendor, then faded to dream-stuff and passed away; the Greeks and Romans followed and made a vast noise, and they were gone; other people have sprung up and held their torch high for a time but it burned out, and they sit in twilight now, or have vanished. The Jew saw them all, survived them all, and is now what he always was, exhibiting no dulling of his alert mind. All things are mortal but the Jews; all other forces pass, but he remains. What is the secret of his immortality?"

Another example is the Torah itself. From a scroll possessed by a small nation, it has gone on to become (in translation) the world's all-time best-selling text, influencing the beliefs and conduct of billions of people. Many of the Western world's laws, traditions, culture and values are directly attributable to Judaism.
1) The Jews' monotheistic religious tradition shaped the Western beliefs about God.
2) The 7-day week, including a day of rest for everyone.
3) The concept of morality, including the dignity and value of a person (whereas idolatry had tended to go hand in hand with cruel, licentious and excessive behavior, since the caprices which were narrated concerning the idols were adopted as an excuse to imitate those types of behavior).
Women's rights also were carefully maintained in Judaism. Israelite women could own property, could initiate court cases, could have their own servants, and could own fields and businesses; and the Torah specifies marital rights for women (Exodus 21:10).
4) Under Israelite law, everyone had recourse to the courts. A child, widow, wife, etc., could initiate legal action against any citizen to redress perpetrated harm. Compare this to those societies in which only mature, land-owning males had any legal status.
5) What is customary to be eaten in Western society is a reflection of much of the Judaic dietary law. With the exception of the pig, Western society does not eat species not contained in kosher law. Owls, mice, insects, rats, snakes, cats and dogs are not eaten by most Westerners and it is a direct result of Jewish culture.
6) Parents are responsible for teaching children. Illiteracy among Israelites, in every generation, was rare. Universal education in the Western world is taken for granted today, yet this is a recent development. In Judaism, however, it goes back 3300 years. Judaism has always maintained that education is the highest goal of man in his pursuit of Godliness. This tradition has now been passed on to Western culture.
7) Infants are to be protected and cared for, whether or not they turned out to be the gender you were hoping for. Compare this to societies in which unhealthy babies, or females, were killed.
8) Cruelty to animals is not acceptable.
9) A robber repays double to his victim, or works it off. Cutting off the hands of a robber is a punishable crime. Debtors are not imprisoned or harmed. They are made to sell property and/or work to repay what they owe. Compare this to the Roman practice by which anyone could accuse a man of owing them money and the debtor could be killed.
Western jurisprudence in general is based in part upon Judaic Torah observance. A quick look at the Ten Commandments (Exodus 20) and the laws that follow (Exodus ch.21-23) gives a very good summary of most modern law.
10) It is the responsibility of the community to support the widow, the orphan, the poor, and the stranger passing through.
It is important to note that every one of the above was instituted among the Hebrews (a.k.a. the Israelites) thousands of years earlier than in other nations. Here's just one example: Aristotle, who was among the greatest of the Greeks, and Seneca, the famous Roman, both write that killing one's young babies is perfectly acceptable. Professor and former President of the American Historical Association, William L. Langer (in The History of Childhood): "Children, being physically unable to resist aggression, were the victims of forces over which they had no control, and they were abused in almost unimaginable ways."