1)
How did she put her Zenus on them?
1.
Rashi: She put a heart of adultery and a Ru'ach of Zenus on them ? she lusted for them.
2.
Malbim: This was in the days of Hoshe'a ben Elah ? he was a slave [to Melech Ashur].
2)
Why does it say "uv'Chol Asher Agvah?"?
1.
Rashi: All the Nochrim that she joined with them, she learned their ways and became Tamei via their idolatries.