Well, to start off with, if you support this group I would suggest your best way to help them succeed is to not get involved.
If you characterize the main opponents of the idea as either "religiously minded" or "narrow-minded and negative" your clearly not the type of person they need to win over opponents.
For instance: I am a Christian. While I believe the Bible is quite clear on never committing suicide, I am very sympathetic to the use of euthanasia for terminally ill patients, or brain dead patients unable to sustain themselves. To me that's not suicide, but shortening the wait time on the inevitable outcome of their affliction. I'm skeptical of our ability to implement it in an acceptable form, so it would have to be a long, arduous process to form the laws, safety measures, before I could fully support the idea.
So, if not being involved isn't an option for you, I would suggest not being so narrow-minded and negative towards the goals of the opposition. Many of those opposed, perhaps the swing vote in its entirety, would likely respond positively to a well thought out, cogent argument that eased their fears of misuse. This does not begin with hostile labeling, as you have done with me and subsequently me to you.
You're a great writer Ox, and would be a benefit to their cause, you might just need a little brush up on your rhetoric to make your contribution soar.
