Firstly, God's covenant with the Jews was to bring Messiah from the line of Abraham. God fulfilled his covenant with the birth, death, and resurrection of Messiah. Messiah gave us the new covenant, through his blood, that it would cover the sins of those who would believe in him. But, just because Messiah fulfilled the covenant with the Jews does not mean he doesn't still honor the promises he has made to Abraham and to Israel.

I will bless those who bless you, and him who dishonors you I will curse, and in you all the families of the earth shall be blessed.” Genesis 12:3

He repays blessings and curses that are brought on Israel in kind. For instance, the Nazis sought to destroy Israel and for that he crushed them. In turn, the US helped Israel militarily and economically. After the war, the US has been the greatest economic and military power in the world. Of course, now we understand how corrupt our system has really been.

Clearly, Israel has a special place in God's heart and I would caution any who would see harm on that nation as you are inviting God's wrath, imo.