Use the word COVENANT to explain why the Jews thought they were the chosen people:

According to the Hebrew tradition, embodied in the Old Testament texts, God made a pact with the Jewish people, by which he gave them the tables of the law that contained the 10 commandments, which had to be fulfilled by the Jewish people, in exchange of God leading them to the Promised Land, Israel. According to the biblical texts, God appeared before Moses, who was the representative of the Jewish people before the divinity, and the intermediary between the will of God and the will of the people.

in about winter like late november to january

we need an attachment to see what you are talking about.