Empathy
I'm always amazed at how little empathy people have for each other. It shouldn't be so difficult for us to try to put ourselves in someone else's shoes, but for whatever reason it is. I know I'm guilty of it as well.
An example closely related to MS is embryonic stem cell research. There exists the ideological movement to ban such research. But I would bet that, for most who oppose the research, if they had a child or parent who could potentially benefit from the research, they would change their minds. Not all of them, but some. Until these people are personally impacted (or their loved ones are impacted), it's easy to form a "moral" opinion.
As someone with MS, I want to continue embryonic stem cell research. And I want it to be funded by our federal government so we can find out as quickly as possible whether it could help us, along with many others. I find that to be the "moral" opinion in this debate.