In Syria, if [Bashar al-] Assad had just been a statesman and handed over the reigns in time, Syria would not be heading down the nightmare that it is today.
Probably after Vietnam and Watergate, there was an increasing distrust of institutions, so that Jesus was still in, but the institutional church was no longer an attraction. So, I think that the dropping of the denominational label is to become more generic, less of a threat, less of a reminder of negative stereotypes if you've walked away from church.