Which is it. Is using that technique ethical and proper, or isn't it?
The evangelical Christian sees it as unethical not to provide the assistance (i.e. salvation) that this person needs.
The JW has a similar view from his perspective. But the two disagree, because they disagree over what is required for salvation. Thus each sees his own action as ethical, and that of the other as unethical.
This is a clear example of moral relativism.
It seems to me that you (ramoss) are asking for a morally absolute judgement, and that is not possible.