“Harsh and utterly grievous was the onslaught of evil. The temple was filled with debauchery and reveling by the gentiles. They dallied with prostitutes. They had intercourse with women within the sacred precincts. Besides they brought in things for sacrifice that were unfit. The altar was covered with abominable offerings which were forbidden by the laws. People could neither keep the Sabbath, nor observe the festivals of their ancestors, nor so much as confess themselves to be Jews.”
The gentiles took over the Temple. This was mentioned in 1 Maccabees, chapter 1, but here it is more specific, especially about prostitutes as part of a fertility cult. They would have intercourse in the sacred places to help have children. They also offered unfit sacrifices. The altars were full of all kinds of Jewish forbidden abominable offerings. The Israelites could not keep the Sabbath, nor observe their festival days. In fact, they could not even confess that they were Jews.