They may not have said so but it is obvious thay they do.

When a song is written it reflects the world as seen by the writer in his/her own view and vocabulary.

That world view may not be acceptable to another person at another time.

Or even the same time.

Do we deny history or remove the evidence? For example will German children grow up ignorant of the fact that the swatika (not allowed to be used in Germany today) was emblazoned on WW2 aircraft?

Can you offend by omission?