I just think that the people that you have encountered are believers of the stereotypes and myths that are and have been circulating for a long time. They are believers of the rivelaries that the sororities/fraternities have. And that since we have this "FRIENDLY COMPETITION"
thing going on, that it lies deeper than that. "Deltas and AKA's as organizations don't like each other, (
which isn't true) so why would it's members be sociable and friends with the other. People like this are why these stereotypes can't and won't die.