“Brothers and sisters, if someone is caught in a sin, you who live by the Spirit should restore that person gently. But watch yourselves, or you also may be tempted.” - Galatians 6:1
Secular law does not dictate conscience. Lots of things are legal that a moral person should not do. And it is by living by the Spirit that one becomes aware of it. People immersed in the World are not aware of the numerous transgressions they do. Chief of which is to insult God.
It seems to be a compulsion for unbelievers. But insulting God is a way of finding out who He is. And it should not go unchallenged. But disputing it should not be aggressive either. Because the point is not to be right, but to allow God to work in their lives.
The scriptures are the inspired work of those who knew God. But unbelievers don’t understand it. The Islamic prophet Mohammed claimed to have flown over the desert on a magic carpet so as to fight two battles at once. Jesus healed the sick. Can you not see how confused the unbeliever becomes? God is real. God has authority on Earth. Arguing aggressively with an unbeliever doesn't illustrate it.
And believers get confused too. Being saved does not mean one is smart. But the spirit filled believer has not got a license to usurp God just because they are a follower.