Many different kinds of people oppose assisted suicide, and for many different reasons.
Civil libertarians note that it is often administered coercively or involuntarily, in spite of supposed legal safeguards. People with disabilities oppose the practice because they are most vulnerable to its abuses. People with long-term illnesses oppose it because they see that it devalues their lives. Survivors of suicide attempts oppose it because they know that the wish for death can be temporary, and that it is always destructive. Religious Jews and Christians reject suicide for the same reason they reject murder, because only God has sovereignty over life and death (Deuteronomy 32:39). Muslims also reject suicide, as it is condemned in both the Quran and Hadith. All of the major world religions agree in their negative judgment of suicide.
For more information, please visit the Californians Against Assisted Suicide Coalition website.