Subjective sentiments , are the converse to Unconditional Feelings. As an demonstration, take 'Love.' Animals & some people will give you their love, & it will be Unconditional. For Most of us though, giving Love is Subjective. We have conditions we put on the love we give, so the other individual can have our love but Only Subject to Our Conditions. But I believe this kind of meaning has not anything to do with your question, as you cited the war. In the case of Wartime interred prisoners, "Subjective sentiments" ...