While not wanting to invoke reductio ad Hitlerum, the pointless extermination of six million Jews in the Holocaust would have been a good time for intervention. You’d need a stunningly convincing argument that it happens at all when it didn’t happen then.
For whatever reasons, God clearly doesn’t physically intervene with any great frequency. Agreed He created a wonderful world, agreed He’s a loving Father, but it’s up to us to build the kingdom of God.
In the book of Esther the Jews are in exile in Persia, apparently abandoned by God. Evil forces are planning their destruction and they are seemingly doomed. It is only at the end of the story that we realize that behind a series of what appear to be unrelated events, was the guiding hand of God, who saves the Jews with whom He has made an eternal covenant.
So only in hindsight can we understand how God has brought the Jews from apparent desperation to something greater.
There are three major events in Jewish history.1) The going out of Egypt, receiving the Torah and coming to the promised land;2) the destruction of the second Temple and the diaspora;3) The rebirth of the nation of Israel in her land.
In each case these major events were accompanied by events that seemingly signaled punishment of the Jews. In hindsight we can see that this “punishment” brought about a fundamental and necessary change in the reformation of the Jewish people. Moses spends the last third of his life wandering in the desert, never to enter the promised land. Neither do all the people who left Egypt with him. In forty years all but the youngest have died, replaced by two new generations. However, in those forty years a new Jew has been born, freed of slavery, guided by Torah. God has established the conditions for the Jew to turn from slave to freeman, able to rule himself, to fight and win battles, to withstand paganism.
The diaspora of the Jews is accompanied not only by the destruction of the Temple but by one third of the Jewish people dying in uprisings against Rome. However, from this calamity a new Jew is born. One so committed to his Jewish identity he alone of all the ancient peoples will survive. Judaism will cause the creation of Christianity. The Christians will pass laws virtually excluding the Jews from participating in general society and in essence causing them to live in a form of autonomy. However these anti-Jewish laws will not only insure the survival of the Jewish people and prevent their assimilation but also foster the conditions for the massive intellectual development of Judaism. When the Jews begin to be allowed into general society in the 19th century they will do so from this unique advantage, fully equipped to contribute in all areas of life.
Christian anti-Semitism will lead to the Shoah. Again one third of the Jewish people will die. However, once again events will lead to the recreation of a new Jew. The diaspora Jew will be replaced by one who can understand the essence and need of the Jewish State, the meaning of “never again”. The animosity and terror surrounding the Jewish State will not only not weaken it but cause its unprecedented development.
These interrelationships come up time and again as God guides the Jewish people. The King of France contributes to the American revolution helping the Americans to defeat the British. The extra taxation will lead to the downfall of the King and his eventual replacement by Napoleon. Napoleon will bring about the changes which will lead to the beginning of the allowing of Jews into general society. This will come about in time for the Jews to begin to come to modern Zionism and participation in the events that will lead to their re-independence in their homeland. The first State to recognize Israel will be the United States and the United States will become Israel’s close ally.