You can't force people to give up every single piece of their identity and what makes them different in order to fit this new politically-correct bland mold of people who all act and think the same so that no one feels "excluded". As humans we are different, diverse, have different types of humor depending on the geography, age, gender, subcultures etc. Being able to cope with that is part of being a mature, well adjusted person.
All this PC "let's-all-be-the-same-hold-hands-and-sing-kumbaya" crap is getting tiresome. It goes against everything that makes us human, different and unique. If that's the world you want to live in - fine - keep going with your crusade and feeling indignant every time someone shows a trace of uniqueness and being different. I for one refuse to live in such a suffocating colorless world. I love being different from other people because everyone is more interesting that way, and yet at the end of the day I can still find a way to relate to others.
The world owes us nothing. If you decide to take away positive aspects from your daily experiences, that's what you'll get. If you decide to feel miserable and angry when people don't act the way you want them to act, then sadness and misery is what you'll get.
Since I know that some blockhead is going to try to strawman me, I will preempt that by saying that I don't believe we should start calling black people "niggers" or take away women's right to vote. Just saying that if people manifest their diversity in a way that's not harmful to others, there is no reason to get upset.