Why did the Torah begin with Creation? Part 1

Hi,

"R' Yehoshua of Sichnin began, citing R' Levi: "He told His nation the power of His deeds. (Tehillim 111:6)" Why did Gd reveal to Israel that which was created on Day 1 and that which was created on Day 2?

"Because of the idolaters, lest they oppress Israel, saying, "You are a nation of despoilers!" Israel could respond to them and say, "What about you? It is despoiled by you, for 'Caphtorim who departed from Caphtor destroyed them and settled in their place! (Devarim 2:22)' All of it belongs to Gd; when Gd wished, he gave it to you, and when He wished, He took it from you and gave it to us."

"Thus it is written, "To give them the portions of nations." Thus He told them of all of the generations."

(Midrash, Bereishit Rabbah 1:2)

Have a great day,
Mordechai