Many people are looked down upon today. We have come a long way since then in some regards - in others we have not. People are people though, you can educate and re-educate them about things and outright show them living proof right in front of them, but unless they are willing to accept it as fact - they will not, there will always be an argument or an agreement to "shut you up" and then anger later.

Some people still see women as weak.
Some still see the disabled as people to be avoided at all cost.
Some people still label unwed pregnant women as a w****.
Racism still exists.
Discrimination against certain beliefs still exists.

Humankind will always have those who are cruel and judgemental about one or more things.

Humankind is flawed - but the flaw is what makes life beautiful.