The Jews are the chosen people but not a master race.
They are chosen to be an example to everyone else and are held to a higher standard by God.
In this regard they are a servant race, They have to work harder.
The current state of Israel is the antithesis of this. It has many points of similarity to Nazism.
The religiously anticipated restored Kingdom, the Messianic Israel is meant to be a beacon of peace and learning. It is meant to draw all people to God via the example set by the Jews.
This is not what we have here.
You have to be careful when you say things like "the worst thing ever".
For one thing ever is a very long time in both directions.
Jewish people have a long history of being labelled as especially evil or worthy of punishment. This is what what is usually called antisemitism and it's still alive and well and wandering around the 21st Century.
Human beings of any group are capable of vile acts if you want a modern example that rivals this look at Rwanda.
Next door neighbours for years, hacking with machetes the limbs of women and then rolling them into pits of shit to die because a voice on the radio says it's permissible.
The Game of Thrones is a mild pastiche of the real vileness of humanity not getting the humane thing for thousands of years and for the last few thousand the Jewish people have been the victim of choice for the Western powers so contextualise before you go too far off the rail there.
The current state of Israel is a fad like the Crusader states. Hopefully the region will become the beacon of peace and hope promised to the religions of both sets of people but it won't happen all the while America throws arms at the Israelis and Russia throws arms at Iran.