How often do the different Races inter-mingle with each other?

[Theodric]

In other words, you've twisted the possible motivation behind the tolerance of adventurers to fit your own conspiracy theory. Mmkay.

Look, not everything is a bid to make Garlemald look bad.

Nice try, but no - that's not the case at all. I just think it's a shame that there's no real racism displayed in-game by the protagonists. I find politically correct protagonists dull and tiresome. They don't all need to be edgy anti-heroes either, of course, but some variety would be pretty neat. I want more heroes with flaws that fit the setting. Not heroes who are 'too cocky' or 'overestimate their abilities but somehow prevail against all odds anyway'.

I just feel like the whole 'adventurers are more tolerant' thing is just an excuse to avoid touching on racism at all unless it's to add a stereotypical bad trait to an established antagonist.

I mean, there's a lot of lore hidden away that isn't showcased. Ul'dah screwed over the Beast Races and had them exiled from the city. It's barely mentioned in-game. Gridania in 1.0 was a lot more xenophobic...but again, it isn't really showcased in-game to the same extent.