I see you've began you discovery of the Zionist conspiracy to breed his last opponent in world domination (the proud white man) out of existence. Use this knowledge well, my brother, and remember, 14 words can change the world.
Why were you searching for happy white american couples?
Like Verb said, it's showing images with a lot of the colour white in them. You'd probably get similar results if you searched "happy american couple" and searched by colour.
That's what you get for using Google.