That is like asking why Jesus or the ancient prophets of God didn't predict the Jewish holocaust, or the world wars or the rise of Islam, a religion that is so antagonistic to the teachings of God in the bible, and is to blame for a lot of bloodshed in our present world, and is directly responsible for the persecution of Christians throughout the middle east and Muslim Africa.
One problem, the Christians, Jews & Muslims all worship the same entity, The "God" of Abraham, whether called Jehovah, Yahweh or Allah, it is the same entity, so God is Fighting God and has been for centuries.
There is no better love between 2 people than mutual respect for each other WT Young, 2002
Who gave anyone the authority to call me an authority on anything. WT Young, 1969
Since Evolution is only ~90% correct it should be thrown out and replaced by Creation which has even a lower % of correctness. W T Young, 2008