British Propaganda

It appears that this poster is encouraging women in Britain to join the Red Cross. The "story", the scene, makes me sick. I feel that depriving someone, even one's enemy, especially one's enemy, of water is like a crime...an act so lacking in compassion that you wonder if that person is actually human, something associated with an incorrigible villain in a fairy tale. I don't want to believe that the "German Sister" actually did that. Shame on Britain. Posters encouraging contribution to the war effort by appealing to national pride is acceptable but this is going too far. Of course, this kind of behavior is still prevalent today. Some advertisements blatantly put down a rival's product in comparison. Honestly, for me, it backfires: I don't want to buy the product being advertised. I think advertisements should "play fair". I understand that propaganda is by definition biased, but this is too dramatic.