It is better to ask questions,than to assume or judge.Ignorance can be a CHOICE.You can ask someone or even just try to educate yourself via the Internet or meeting new people with different life experiences and opinions,or disabilities.
I've used this tree metaphor before. You wouldn't walk up to a pine tree and say, "Pine tree, you have too many pine needles. You need to grow apples." Accept people for who they are, just as we accept the rest of our natural world.