Sforno on Deuteronomy 7:16/ספורנו על דברים ז׳:ט״ז

1לא תחוס עיניך עליהם ולא תעבוד את אלוהיהם. By not ignoring idolatry in your country by people remaining there you will ensure that no Israelites will worship such deities. If you will turn a blind eye to their practices they will undoubtedly lead you into sin.

2כי מוקש הוא לך, although you relate to them by protecting their freedom of worship, they will turn out to be a stumbling block for you by seducing you to join them in their religious rites.