Maybe this is because that Not All Fraternity/Soroity are founded upon Christen Ideals of what ever. A lot has changed over the Years, Triangle, KGR or what ever! Remember the White or Black Clauses back when!
Were there Greek Organizations that evolved because of certain times and situations, of course, but what if a Totally Not integrated Greek Organization are available Today? I am talking of Course National Organizatiosn of today, not a local.
Yes, there is a big Difference.