1)
What is the meaning of "va'Tiretz Imo"?
1.
Rashi: You consented to go with him.
2.
Radak: You wanted to have a hand (be a partner) with him.
2)
Why does the verse discuss these Aveiros?
1.
Radak: They are done covertly. (The sinners hide their evil from people.)
2.
Malbim: What benefit is there from Chukim, if you cast in back of your pride primary Mitzvos like theft and adultery?!