It is generally understood that historically oppressed peoples (that includes LGBQT, people of color, etc.) are offered a proportionally tiny number of substantial roles in film & television projects (yes, even today) that suit their identities. That's a fact: there aren't a whole lot of roles for people who are not white, cis, and/or straight. It's insulting when the few roles that do pop up are taken by white, straight, cis actors (i.e. ScarJo for Rub & Tug). So yes, they do tend to be afforded greater flexibility in casting... because otherwise the parts don't exist. Playing a white American versus a white British person isn't an actual controversy, and you know it. Knock it off with the bad faith argumentation.
It's painful you think the existence of Dallas Buyers Club is an actual point in your favor. Many see Jared Leto's performance as cringe-y, and many are deeply disappointed that he won an Oscar for the performance (just as we've come to regret many award-winning performances rooted in insensitivity or unfortunate realities of the era).
Let me know when you or Mike can articulate actual arguments.