From Doug Groothuis:
Unfortunately, I think there are many factors currently conspiring against the disabled. TV and advertising promotes perfect bodies. Pumping iron. Cosmetic surgery. The youth culture.
Ultrasound and amniocentesis promote eugenic abortion of disabled babies. So the disabled are becoming rarer. Hence, less tolerance for those that remain.
There are increasing strains on the healthcare system, further aggravated by Obamacare. Since the disabled make greater demands on the healthcare system, they are viewed as a drain on the system.
Combine that with militant secularization, and the future is very bleak for the disabled.