Yeep.

If that's the case your Dad is a pretty wise man.

Nah, I think the Wizarding population is smaller than the Muggle one. I don't think they would ever call Muggles normal humans because that would seem to imply wizards were abnormal. And I agree with you completely on the default for humanity thing. Especially in the cases of weres and vampires. They're still essentually human. Kinda cruel to just shove them to the side when they become afflicted you know?