I am on faculty at a Florida university and we have about 5% disabled students on campus/full time students. (larger number part-time because they won't, physically, be able to meet a graduation time frame. Yes, we also have 22% of our International students who are Indian, but none of them that I know of are disabled. My office is in the heart of the campus and my window looks out over a flood of students every class break: skateboards do predominate, but wheel chairs and canes (and crutches of course-- those skateboards again I guess) are also very present.
Now, to address the underlying problem that you don't want to talk about:
1) you clearly have a problem with people unlike yourself, as in disabled, international, or maybe even LGBTQ (although that was not clear from what you said and if I am wrong I apologize for over reaching)
2) Disabled people are often unseen: they often don't move quickly and easily from class to class and will often wait until halls and sidewalks clear before they move on.
3) people in wheel chairs especially can't be easily seen in a crowd because they are below eye level, and, most importantly:
4) If you have a built in distaste or dislike for a group you can respond by either seeing them everywhere (your "Indian students" example) or not seeing them when they are present (your "how many people do you see around in wheelchairs?" question). What you are showing, and I hope trying to see, is that prejudice controls the patterns that you are looking for and therefore seeing. You are the victim of your prejudice.
Now, while it is not popular to be thoughtful and reasoned in a comments reply anywhere on the internet, I think it is time for me and others to begin to talk honestly and clearly to people who feel empowered to attack a broad spectrum of people for little or no reason, and to give them a chance to think about their statements without attacking them. Instead I hope we can begin to address their real issues and show how to have a reasonable discussion. Will it work? Only if we care about honest and rational discourse and act on it ourselves. You sir, yes you, have the opportunity to change your approach and join us. Please do, I would love to talk with you in a neutral setting.