The right to life is no more a 'matter for the states' than religious liberty, freedom of speech or assembly or any other fundamental God-given right that is spelled out in the Bill of Rights.
Our legal and political leaders have come loose from all of the most important moral moorings.
This is a horrible law, but I have long thought the way to overturn it is to take it to the voters again after a lengthy period of voter education.
Suicide isn't really a right to life issue. An individual does have the right to life, but that is his right. He owns it. If someone is committing suicide, no one is infringing on his right.
The right to life is your own right to life. If you want to life they you should have that right protected from people wanting to kill you.
However the right to die is something completely different. If you inflict death on yourself that is your choice but neither that right nor the right to make people stay alive is protected by the constitution.
Being we can legislate either way.. which is why it should be left up to the states.