It begins with attitude adjustments on all sides. Knowledge Of Both. Seek to understand the unknown. The unfamiliar tends to be avoided, even feared. An opinion based on lack of information or misinformation is not helpful.
Knowledgeable opinions are a great asset.
There is much good in the contemporary music world. Traditionalists can learn about contemporary trends and youth can learn much about traditions. Some traditions are worth keeping, as long as we worship God, not the tradition. Tolerance Of Both. Accept the validity of other styles.