I think appropriateness of songs is to be judged by the nature of the context of presentation.

If you do not intend to incite hatred songs will not do that.

Its sort of like songs plus attitude and preaching is bad songs just sung harmless.

When a song is presented as art as music and lyric- abstractly it should be appropriate. The difficulty comes when the artist performs a song then includes an introduction and conclusion statement which incites people to action.

You need not say anything just play the song or you can talk about the song as music or art- then it would be just that music or art.

If on the other hand you wish not to have a concert or open festival you may sing the song at a political rally where you can use it to incite behavior and if violent behavior is incited in that context it is bad.

While many causes are good in my view the only way to avoid politicization of the venues, media and festivals is to encourage the context of presentation be that of art and not politics. That helps us be more inclusive yet not guilty of preaching or inciting action.
This shoiuld apply imho to all sides of any discussion.

Conrad