Simply present the truth. God's holiness and love are perfect and normalize perfectly. They are not diametrically opposed to each other nor are they in conflict. One cannot rightfully discard one for the other.
It is in scripture we find the proper relationship between God's moral law and His agape love. Two equal and opposite dangers must be avoided:
1. Legalism effectively ousts agape love as a dynamic of the gospel and the Christian life by reducing both to obedience or conformity to a set of external commands or rules (after the manner of the scribes and Pharisees in the gospels).
2. Its opposite, antinomianism, ousts God's moral law as a dynamic of the gospel and the Christian life. Antinomianism is heresy that tells Christians it's OK to forget about God's law and concentrate solely on agape love... a course which is a justification for degeneration and immoral licence, such as homosexual marriage, rather than promoting the true Christian liberty (i.e. freedom from sin).
The Gospel of Jesus Christ and God's grace in Jesus Christ frees the Christian from both these erroneous tendencies but only if Christians respectfully strive to follow God's moral law and both practice and realize agape love in their lives.
Believers should be told that they are responsible for maintaining their testimony. That is not antinomian!
Unbelievers cannot reasonably be expected to have a testimony!
1 Co 6:12
12 All things are lawful unto me, but all things are not expedient: all things are lawful for me, but I will not be brought under the power of any.
KJV
1 Co 10:23
23 All things are lawful for me, but all things are not expedient: all things are lawful for me, but all things edify not.
KJV
If an unbeliever reads these verses and sees us trying to put them under law; how do we maintain credibility.
Until 1827, in some New England states, public nudity was used as a punishment for what the state deemed to be lack of self control. This public humiliation was often accompanied by whipping.
If some women want to voluntarily subject themselves to what was not very long ago used as criminal correction; the jeers and scorn of unbelieving onlookers will quickly assert themselves; and may be more effective than any law.
We in the meantime can refrain from compromising our witness.