thalaiva.... your statement itself provides the answer... (highlighted in bold)... it not only depends on us brahmins, but on the innumerable other communities as well...There are only two species-man & woman.Any man and any woman can marry and live happily,provided the society they live in allows such freedom,and they themselves are free from any peer pressures.This is the original truth.
sb
not everyone is a gnyani or a seeker of moksha... in this harmonised ions provide more magnetism than haphazard ones... hence the idea of marriage within one's culture as the mental frequency would more often match with the other...
but of late, this has not been happenning... this is the result of such outside marriages... this is not a fault of our culture, but the individual and collective failure of ourselves to raise up to our ideals....