Any system that discriminates along racial, religious, caste, class, orientation, color or creed is an outdated, archaic and obsolete system. This type of tribal thinking has been ingrained into the human mind as a way of controlling populations and borders. That is, it has long been and effective tool of those who wish to rule over and oppress others.
But the world has changed, and is changing more still. Tribal tyrants and their decrepit tools of control are on their way out. Good riddance.