Our Sidra ends with Hashem’s instructions to Moshe to ascend Mt. Nevo to see the Promised Land for he will not enter there physically. The Torah says: Hashem spoke to Moshe, בְּעֶצֶם הַיּוֹם הַזֶּה, “…on this very day…”. (Deut. 32,48) Of course this was the day Moshe was to die.
Rashi points out the three places in Scriptures that the expression בְּעֶצֶם הַיּוֹם הַזֶּה “on this very day” is found. It is used, in the story of the flood, at the time the Israelites left Egypt and at the death of Moshe. In each of these cases the people said they would not allow it to happen. Hashem then carried out His intention. בְּעֶצֶם הַיּוֹם הַזֶּה, which means in broad day light. He thwarted their intentions.
We can understand that the intent of the people during the flood was to prevent the people from entering the Ark and destroying it. During the Exodus their objective was to prevent the people from leaving even if they had to resort to killing them. What could they have done to prevent Moshe from dying?
The answer is they could have prayed. We know prayer can annul an evil decree. That is why when a person is sick we recite aמי שברך . They could have done so but did not. Hence Moshe died on that day in broad day light.
In our day we see many atrocities throughout the world and we often can prevent them but we don’t. We must be more sensitive and every individual must do as much as one can to avert them.