I had hoped that the humans of the 25th Century Federation had evolved or developed educational, political , and other social systems to where bigotry wasn’t a large problem anymore.

Kind of like money.

Otherwise, there will always be a dark undercurrent of prejudice and hatred in all human dealings, and maybe the Romulans, Klingons, and other antagonistic spacefaring civilizations are justified in not wanting to deal with a human-led Federation.

I don’t think starfleet captains have the authority to command the hearts and minds of their officers.