Debate them like you would any other religious person, don't be intimidated. They'll swear that they're the one true religion like the rest, which they will bestow pretentiously and with conviction.
You'll be fine, basic logical faculties, critical thinking and scientific understanding is all you really need.
You'll be fine, basic logical faculties, critical thinking and scientific understanding is all you really need.
If the hypothetical idea of an afterlife means more to you than the objectively true reality we all share, then you deserve no respect.