Did God create only Jews? This part of a class tries to answer this question providing sources. When did non-Jews appear in creation? When did Jews come into history?
See Likutei Torah of Arizal, Tehilim, 32.
See Midrash Bereshit Raba, 1:4.

Look at Zohar, part 2, 108b, where it says that God first thought about the Jews, and then created the "shell", that is, the non-Jews. It is not a contradiction to what was mentioned in the class, but it's interesting.