What is the punishment by the Wicca goddess-god if a Wiccan follows another religion's God?

Answer 1

Apostasy, or falling from faith is only a sin in the Abrahamic traditions, in which they can be punishable by excommunication or execution. Wicca and Neopaganism, like Hinduism and Buddhism, do not even acknowledge the concept of apostasy. Thus, in turning away from the Lord and Lady, you can expect no reprisal.

Keep in mind that monotheism as practiced within Christianity and Islam are unique to these faiths. All other faiths, especially the classical ones, acknowledge the existence of multiple gods in multiple pantheons. In fact, it is because of this, and the activism of early Christians that they fell out of favor and, commonly, into the Roman circus as lion chow.

But the Lord and Lady are incarnate in all gods and goddesses, hence, in the Wiccan and Neopagan perspective not only is Yahweh respected, but is, in fact an aspect of the Lord. Yahweh's consort, Asherah who is no longer exalted within Judeo-Christianity, is similarly an aspect of the lady, and hence is sometimes honored as such. (So think of her when you eat your next cheese steak sandwich).

This means that technically one can be Christian and Pagan at the same time. This being how you define yourself. Conservative Faiths like to withhold the status of Christianity from those they feel have deviated too far (say Jehovah's Witnesses, LDS or Unitarians, even Catholics). But if you understand that the Lord and the LORD are one and the same, you can walk on both paths.

The only wrath you will ever face in Wicca is that which is similar to the concept of karma: that evil which you visit upon the world will return to you threefold. The same is true for the blessings and works you give. Follow the Wiccan Rede with diligence and the Lady's blessings will be upon you.