2. Morally wrong, unethical.
Often confused with amoral, unmoral, and nonmoral, of which the first is the most common; immoral simply means bad and defiant of the moral principles of society while amoral means lacking in or indifferent to any morals, neither moral or immoral (neither good or bad).
Josef Mengele led experiments that led to greater medical understanding... but were stridently immoral and cruel.
Israel, through tampering with information and manipulating the public, has oppressed the Palestinians and made their lives miserable for the sake of a "Jewish homeland"; such a policy sounds perversely immoral and counterproductive.