Let's say a new race of humans appeared some 300 years ago.
They spread across the globe and now they reveal themselves to the rest of humanity.
They lived mixed with normal humans for the entire time.
This race has around 10.000.000 members.
They know about their race, but they kept their existence a secret.Until now.

There are two notable differences between them and the mainstream human:

1)they are way smarter than the average person.Think an average iq of 150;

-also far more creative from all points of view;

2)they have more stamina, for example they only need 4 hours of sleep per night.

That's it.There are no other notable differences between normal humans and this race.They don't have supernatural powers, they don't have some weird 6th sense, physically they have the same power as the average person, they don't heal superfast etc.Their appearance is normal.

For a decade after "reveal", humans and them cohabitated relatively peacefully, in the same society.
However, given their characteristics, they are way successful than the average Joe.
It seems that every celebrity, entrepreneur, inventor is a member of this race!

Soon enough, normal humans start believing that they plot to conquer them and start rounding them up and taking them to extermination camps(a la Hitler).
A conflict arises between this race and the rest of humanity.Who would have the best chance of winning this conflict/war?

Edit: 
how they appeared is not relevant.

Why they revealed themselves is also irrelevant.

Their appearance may look normal, but their biology is slightly different.
This changed biology has the aforementioned consequences.