The lens I generally use is "does this part of a culture hurt others?" If so, then yes, it should be phased out. If not, I don't see the harm in leaving it alone.
Keep your tradition to Holidays, music and dance lores and the rest of inocuous folklore, that's fine. But don't ever try to bring these old values back, no one with proper sanity would ever want to go back to the XIX century.
Secondly, I think everyone has a right to have opinions, thoughts and values, that others deem hateful. I would not want to live under your dystopian rule, where there is only one correct way to think.