America has a strong consensus about a lot things even as we are divided on others:
What surprises you the most here? Are you surprised that 80% of Americans say suicide is morally wrong? I've often had to struggle with commenters on this blog when I have taken the firm position that suicide is murder, but I think America mostly agrees with me. There is generally an outpouring of sympathy when someone commits suicide. Why don't we express our moral opprobrium toward the self-murderer? I think it's because that person is gone, and we feel sorry for those who are left behind. They are the victims.
Doctor-assisted suicide is an important subcategory of suicide, and the Gallup report says that it "emerges as the most controversial cultural issue in Gallup's 2011 Values and Beliefs poll." But what is notable is that support for assisted suicide has been dropping and has reached its lowest level of support in 8 years.