You all know if you've become initiated.
Diverse societies are in their decline. It doesn't matter if the diversity is a major catalist or a symptom of something worse (germany self hating post communism) when a society has several distinct cultures within it and they are mixed up and continue interacting all the cultures become weaker. The cultures that do not defend themselves, meaning the members that participate and practice in those cultures do not reinforce their traditions while mainintaing a stable or positive birthrate - they die out. The dominant cultures, those which do get reinforced with stable numbers (by birthrate, adopted culture is inferior and usually alien to the people trying to practice it), those cultures that persist and remain uncorrupted - they fight for final dominance ONE dominance. This struggle intensifies the uncertainty and hate in society and before there is a conclusion the society suffers a fatal ending.
Look at countries, regions, groups of people that persist much like they were 1000 years ago - they may adopt all modern technology but they somehow remain THEMSELVES. Their language may change if look at from the outside and dialects may change in number and new ones may be created but to the speakers of that language their ancient texts and oral traditions are still decipherable.
The dying cultures may impart some of their traditions to the conquerors - often the technoloy they have created - but mostly their remnant genes. But they never get reborn.
You must protect what is yours. Your language and your genes, and everything that makes you distnct.
Never apologize, never relativize. Someone thinks your philosophy is archaic or incompatible with modernity? Too bad for them. You clearly exist today in 2017 and they are jealous of your brilliance.
If a government has the power to push diversity without facing a major revolution/rebelleion then it has already become too sickly and the people too lazy to change it. If a goverment tries and receives backlacks then there is still hope.