In the 1970's we were faced with Roe vs. Wade, and out of ignorance, we legalized abortion. Now, we, with c.40 million abortions since 1973, are faced with another form of murder in disguise. This murder is called 'mercy killing', 'death with dignity', or commonly known as euthanasia. Euthanasia can be either active or passive.
Passive euthanasia allows one to die by withholding or withdrawing life supporting means.
This is a tricky area because ordinary and extraordinary means of supporting life come into the picture. Ordinary means, such as nutrition and hydration, are never to be withheld since they are one's basic right in order to survive. However, one is not obligated to use extraordinary or 'disproportionate' means to sustain life. Due to complexity, each situation needs to be looked at individually when discussing extraordinary means. One can not intend death by withdrawing or withholding treatment, but should, however, obey God and let one die a natural death.