Sorry, racism, ethnic clashes, cultural differences, are nothing new to the world or the church. Listen to these fools talk about Galatians, racism, and Christianity. Also, a little Smalcald Articles on the Gospel!
It's ok to remember those who gave their life for their country and not remind them that Jesus did something greater just so they don't get a big head. You can tell them the Good News however! Sins forgiven - for free!