If you believe you are doing the right thing, and have confidence towards God that it is what God wants you to do, then you are sinning, to not do that thing that God has required of you... whatever it is.
Just don't expect everyone to agree with you.
Do it unto the Lord, and don't condemn anyone else for not doing, just worry about yourself. That is all that you are required to do.
Romans 14:12 "So then everyone of us shall give account of himself to God."
Romans 14:5 "Let every man be fully pursuaded in his own mind."