In case you are wondering, that man is Jan Hus, a Czech religious reformer who was burned at the stake by the Catholic Church in 1415 after being found guilty of heresy.
But back to the topic at hand. As our society becomes more diverse, school districts across the country have students whose parents come from non-Christian societies, such as Hindus from India for example. However, Christians are still the overwhelming majority in this country, and it is understandable for some Christians to be upset when they feel that their traditions are not being respected.
Therefore, I propose that the Solomonic solution to this problem is to simply rename the concert the Christmas and Winter Concert, thereby retaining Christmas in the title, while making a nod towards diversity and inclusiveness.