Sorry Corey, but I'm going to be the Devil's Advocate here and pick apart a piece of your argument.
Though, I'm against involuntary euthanasia, such as sentencing criminals to death. Life is a human right and should be denied to no one for any reason whatsoever, and I think that is all that needs to be said about that!
If the person is unable to decide (mentally ill, coma, etc), then their next of kin should decide, and in the off chance that there are no/no contactable next of kin, then a doctor should decide.
You have two things that contradict each other quite heavily. I mean no ill will, however. I'm just curious as to your response. @Corey