Nocturne,
As a society we had better be concern what our fellow citizens believe, it would be socially irresponsiable not to care if they believe in the end times and you are at war.
"The truth or falsity of a claim is an objective property which stands independent of anything we do." quote
Truth is not an objective property, if so truth would belong to object, it does not, truth is the property of a subject, and is discerned by a subject about the relation between itself and object. As all meaning is the property of a subject, truth as a meaning, belongs to a subject.