1)
What is the meaning of "va'Ynakru"?
1.
Rashi: They made it foreign in front of Me.
2.
Radak: This is like "Elohei Nechar ha'Aretz" (Devarim 31:16). That place does not tolerate idolatry.
3.
Malbim: They made it special for foreign service (idolatry).
2)
Why does it mention that they and their fathers did not know it?
1.
Malbim: You cannot say that they merely persist in their fathers' custom.
3)
How did they fill the place with blood?
1.
Malbim: the blood was from people offered to Molech.
