Strange subject - but I suppose we need to be careful about the Stalin method of obliterating History and many other Politicians would like to re-write history .
These songs EXIST and it is great reference material for interested ethnic scholars and those likewise inclined. We can't throw these songs away as if they didn't exist, in the same way we throw old photos away - (in any scenario) and no one remembers what / who it was all about.
With the passage of time - I would think you must be very sensitive of how you handle such songs and the company in which they're sang