Yes, it does, they are directly involved in how their society is upheld and run - you worship and kiss the feet of a corrupt leader and carry out her even whim without question, you can’t then turn around and pretend you had no part in propagating it. Everyone adored Azshara regardless of how evil she was, she and the highborne are the result of Night elven society, and the reason why the burning legion arrived in Azeroth in the first place.
Spoiler alert, no Blood elf or high elf in existence right now was alive when the burning legion attacked, but the Highborne that the Night elves welcomed home? Those are the very same elves who fought side by side with the legion and Azshara against the Night elves. Night elf society is to blame for Lady Azshara.