Across the entirety of the human populous there are those who are very warm and welcoming, those that are neutral, those
that are cold with most people somewhere in between the spectrum. This is due to several factors ranging from being shy, outgoing, not caring, caring too much etc… I don’t doubt there are plenty of byu students that appear as though they are not welcoming where in reality they are likely just not very social as found in most religions, ethnicities, races, classes etc…