discrimination

Hello,
What is the reason for the discrimination between Ashkenazim and Mizrahi? I never understood it, we're all the same, aren't we? Every person deserves the right to progress and develop equally…
It is true that Ashkenazim, from what I understand, have taken over key positions and come from more developed countries, but it seems that even a successful Mizrahi person can encounter certain difficulties or certain stigmas when it comes to high-level key positions in society.
Do you think that one day the stigmas and discrimination that exist among members of the community will be blurred in the future?