This is a general post about evangelism.
Next time, instead of watering down the offense of the gospel in a futile attempt to get unbelievers to think better of Christianity, try leading by telling a little about the truth of yourselves... that we are great sinners and have no righteousness of our own - that our only hope is in the righteousness of Another... that we are no more deserving of God's favor than they... then when you explain God's holy law it does not give the FALSE appearance that we think we are better than them... because the fact is were not better. But for the grace of God in Christ, I would be capable of any and all sin.
If you do not lead this way in this age, too many people get sidetracked into wrongly thinking that when Christians preach the Law they are somehow saying that God had favor on us because we were more moral than others. God forbid. Make sure people understand the truth that this is the opposite of what you are saying ... That we justly deserve God's wrath save for the mercy of Christ alone and not because we had a good heart, or good intentions or because we were more pure or tried harder than others, No He saved us because of the sheer grace of His sovereign good pleasure in Jesus Christ alone, plus nothing. (Titus 3:5; Eph 1:5).
It is not loving to avoid telling people the hard truth of their condition before God as it is. But I would encourage you to remember to tell it in context with yourself in the picture as well. We leave the results of the gospel in God's hands. When we water down the gospel in the hope our hearers will like it better we are taking the results in our own hands.