Hwo do you determiine what is 'Normal' in society Watch
How exactly do we actually define what is, or should be defined as normal?
There is no "normal" yet we subconsciously define it in our minds. If we're stigmatising people, the only reason we do it is because they don't fit our definition of "normal"
On the main topic: Probably people define "normal" as that which most closely resembles themselves and their peers, and then the society they're in. Yes, this does mean that normal is going to vary from person to person and society to society. It also means "normal" can't be equated to "good".
(And damn, not even 1 page into this thread and already there's transphobia on display. For shame TSR, for shame.)
This isn't really an abstract thing, normal is very basically a definition of what is the most common. I'm aware that word carries some baggage, but homosexuality is abnormal, red hair is abnormal, on a global scale being white is abnormal there's nothing wrong with saying this it's a fact.