You are stretching the facts. Nobody is advocating what you say they are," If we make it legal for doctors to kill essentially anyone they want..." but allowing those who choose to to assistthose who are competent to make their own choices.
Murder is still murder and it happens today with today's laws.
I wonder if it is your fears that govern your decisions or your desires to make decisions for other people.
And after the person is dead, how is he supposed to prove that he did not make that choice.
If you wish to start questioning motives, then I wonder if what you want is what Jack Kervorkian wanted, to look in the eyes of someone who is dying to see life extinguished up close and personal. Perhaps you just love to kill, for the thrill of killing.