"even if misguided Jew just ate a Bacon Double Cheeseburger from McDonalds."
I never spoke about that avera, and yes that person is part of a minyan. Even a murderer can be part of a minyan (in the sense that it wasn't officially said that he cant), but someone who is not Shomer Shabb-t, is not counted. Also if he or she touches regular wine then it is not allowed for a Jew to drink it, unless it is Yayin Mevushal.
Please one more thing- dont take or many any of this personally. It is not a personal thing that is being discussed, and I'm not condemning anyone, but I'm just saying what I heard (from 2 sources, and about the wine many other places as well). Anyway why would a Rabbi from Monsey be disqualified? He is not making it up, he is taking it from the Shulhan Aruch. And you asked if Sefardim follow it? Definitly- much more then the Askenazim (and I know that the Yayin issue everyone accepts, and about the Minyan - I assume that everyone (that matters- I mean the Poskim also agree, because no one argues against it).
And about what exactly it says- i wont be able to search and provide it right now, but if you would like, email Rav Mizrachi, I believe you will get the exact response.