The Lord refers to Judah as his beloved.
This is an expression of the covenant relationship he has established with them, which included the blessing and privilege of having access to the Lord via the temple. But the Lord is now removing that blessing because they have done many vile deeds.
These vile deeds
refer to all the ways in which the nation has consistently broken the terms of the covenant relationship.
15 Que ferait mon bien-aimé dans ma maison? Il s'y commet une foule de crimes. La chair sacrée disparaîtra devant toi. Quand tu fais le mal, c'est alors que tu triomphes!