This politically correct mindset is something many handicapped people resent. They don't want to be marginalized and condescended to like they were fragile little dolls, in need of our "protection." They don't want the rest of us to walk on eggshells around them. They really aren't as fragile and delicate as you make them out to be.
I think some of Trump's popularity and appeal lies in the fact that he treats everybody equally. Whether you are a black, a white, an Hispanic, a woman or a handicapped person, it does not matter to Donald Trump. He is not a "walking on eggshells" kind of guy. People find that very refreshing.
Oh, good night! This isn't about 'politically correct', it's about basic manners in good company, and basic human dignity.
I don't know about you, but if my mamma saw me acting up like that, she'd have tanned my hide - and then told my dad she saw it, and then he'd tan my hide, just on general principles... My Dad's gone now, but my mamma is well into her 70's and if I acted like that even now, she'd be hauling me to heel. Decent folk don't act like that.
Don't be confusing the basic manners and etiquette of polite society with 'political correctness'. If you was raised right, you know the difference - and to try to defend the man on this point is simply unconscionable.