More knowledgeable Christians should never mock or disdain weaker believers, nor should they become stumblingstones toward these brethren.
In every way, God is greater than man. A man would have to be a thief to claim equality with God. Yet, Christ thought it not robbery to be equal with God.
There are two categories of sin: sins against God and sins against man. By default, every sin is against God. Yet, not all sin is against man.
Most people view sin as a private or earthy matter. Yet, every sin is against the Lord. In truth, men can sin against the Father, the Son, and the Spirit.
