I wouldn't make this a label thing. Humans switch religions and political parties and positions in every direction all the time. I'd consider most of the switches more of an emotional appeal seeing the outsider as the victim and converting as a result of empathy for the outsider.
Why do Muslims become Christians? Same thing. It is a species issue not a label issue and the factors that go into the switches of positions are human, not god related.
Why do Muslims become Christians? Same thing. It is a species issue not a label issue and the factors that go into the switches of positions are human, not god related.