Good can be pruned from bad.
I believe our National Anthem is a good example of that. We recite, sing, celebrate and essentially acknowledge only the first verse. I find it quite beautiful and on occasion moving in some instances.
History and context are COMPLETELY different things and in many cases can be total polar opposites. Take the "N"word for example. Horrible, horrible history but in many African American circles today it is a term of affection or brotherhood (at least that’s my perception as a white guy). Context son. Changes everything.
The context in which the amthem is used and viewed today is about pride in country and our hope and perseverance to overcome.
I am of the mentality that I tend to look for the good in most things. People driven to find the bad are doomed to find themselves surrounded by it.
We are of two different minds.