You are correct of course, in that the left wants to blur the distinction between someone who declares a sin a sin and someone who considers themselves morally superior and qualified to judge.
For example, they want to equate a conservative Christian who is outspoken regarding abortion with the extremists that would bomb an abortion clinic, killing and maiming others in the name of God.
So how would they excuse a mother Earth worshiper who kills someone by buring down a building they think is hurting their Earth God?
How could they excuse aborting an innocent soul by placing the mother on an abortion alter and have the child pulled out by an abortion priest in the name of love for self?
How can they excuse the theft of wages of the working class to allow those who sloth a grander life? What have they done to earn our gift?
How can they possibly explain anything they do as "right?"