Do you realize that when God says in the Bible they are His chosen people, it doesn't actually say what they were chosen for, whether for good or ill?
It doesn't say they were chosen to be above the rest of humanity.
And based on how they've been treated, it seems they are more chosen to show whether a country, a society, a religion or a culture is evil or good by how they treat the Jews. Those which have abused, oppressed, attacked and murdered Jews are the embodiment of evil, IMO.
Which makes the Jews basically the canary in the mine of God's judgment of humanity.