Most successes are unhappy. That's why they are successes - they have to reassure themselves about themselves by achieving something that the world will notice.
You evidently do not suffer from "quotation-hunger" as I do! I get all the dictionaries of quotations I can meet with, as I always want to know where a quotation comes from.
All religions and cultures suffer from sources that preach hate against the 'other.' Throughout history some have, tragically, practiced what their sources preached, while some have sought to dismiss or even counteract the hateful words of their sources.