So I got in trouble

[Angrboda]

The religions to which those mentioned deities belong, may not be actively worshiped currently, primarily due to the fact that christians killed all the worshipers. If you believe this is a valid means of killing off a deity you're saying that al'Quaeda is doing the right thing. So far as I can see this doesn't actually amount to a valid argument against any of the mentioned deities.
Also you're factually incorrect on your dates. The people who were to become Jews worshiped El, Asherah, Ba'al, Yam, Mot, Anat, Athirat, Athtart, Attar, Baalat, Dagon, Eshmun, Ishat, Kotharat, Kothar-wa-Khassis, Lotan, Marquod, Melqart, Molech, Nikkal-wa-lb, Qadeshtu, Resheph, Shachar, Shelim, Shamayim, Shapash, Yaw, Sydyk and Yarikh, until Ezra invented monotheism around 450BC.

Shhhhh..... You're using facts and logic. Don't do that. It'll just confuse him.