While "[y]ou would be welcomed with open arms," would you make the connections necessary to contribute to the community? Practicing political correctness is no substitute for investing actively in the development of genuine connections with others. Images of diversity is not enough. What's more, communities take shape naturally over time. I attended a high school with a predominately African American student body. I had some very close African American buddies. I am White. But there was a great deal of naturally occurring division among the student races. Is that not a function of connecting to those who you identify with the most?
Presbyterians are diverse? Who are you kidding? White Presbyterians could just join black Presbyterian churches or other non white Presbyterian churches and quickly create real diversity. You would be welcomed with open arms.