There's an unsettling undercurrent of thought in the disabled community: "What if society decides I'm more trouble than I'm worth?" Some of their opposition to legalized euthanasia probably comes from that, and some from religious motivation.
Obviously neither justification is valid as a basis for making laws that apply to us all, but on the other hand, how do you tell them their concerns aren't worth listening to? Some cultures have practiced selective involuntary euthanasia in the recent past, so you can't say "It'll never happen."
The fact that some doctors will readily offer it is also a concern. Without strict oversight to ensure patients aren't unduly affected by medical professionals in their choice is something that bothers me greatly. I'm all for euthanasia but it must be done in a way where the patient is of sound mind and knows there's alternatives to it like assisted living if the condition itself isn't fatal.
