I believe Romans 1:23 (I think) sums it up succinctly...”Professing to be wise, they were fools.”
You were close...it’s Romans 1:22. ;)
“Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.” So seems like to me the concert should be able to go on as it is not unconstitutional accorrding to our Constitution- unless there is another clause of the Constitution this so called group is refrencing