As one whose ancestral denomination saw countless congregations separate over German vs English in the late 1800’s: Spot on.
EVERYBODY has to bend a little. The young need to learn traditional hymns. Their elders need to accept some of the youngster’s musical style.
If any become too stubborn the sad result is stratification and division.
I have no problem with traditional hymns or contemporary “worship” songs. I would welcome both in the “traditional” service. What I have a problem with, at least the way my home church runs things, is that the “contemporary” service is like any non-denominational contemporary service. There is very very little included in the service that helps to identify that it’s actually at an LCMS church.