" For one must be saved from something, and that something is the sin that plagues all of humanity. If we are not able to declare immoral acts sinful, then evangelism is worthless and Christianity becomes a feel-good group, not the truth of the ages.
..."
http://apologetics-notes.comereason.org/2014/10/are-we-not-to-judge-unbelievers.html?m=1
-vk-