Sophie, following your link, Rashi's commentary on Deuteronomy Chapter 7 : 1-2 consists of only the following.
Quote:
1. He will cast away. Heb. ????. This is an ex-pression meaning casting away, and causing to fly. Similarly is (Deut. 19:5),?and the iron [axe blade] will cause to fly [from the tree].?

2. nor be gracious to them. Heb. ?? ???? This means, you must not show them any grace (?) . It is forbidden for a person to say,?How handsome is this heathen!? Another explanation: Do not grant them a settlement (???) in the land. (Avodah Zarah 20a)


This doesn't address my question.



Quote:
The mitzvah against intermarriage with non-Jews

My question is not about intermarriage.