When we keep the law, there is no other problem and the world will go well. However, If we break the law in this world, this world would get out of shape and someone who commit the sin should be punished according to his gravity of the offense – Political lawlessness, the offense of the traffic law, any other law-breaking and so on.
God also granted us the law of God to lead us to everlasting Heaven. Then, is it okay not to keep God’s law?. Absolutely not. It is very nature that the people of Kingdom of God keep God’s law.
It means that we must not keep the lawlessness which is the rule taught by man and not in the Bible. Simply saying, it was made by Man, not God. Many people misunderstand that the Sunday observance, Christmas and Thanks Giving Day were made by God. But, these lawlessness was come out from the world with the effort of Man (Roman Emperor Constantine and the President of USA). There is no relation with God.
Of course, God is not pleased when he have to look his people whom keep the rule taught by man.
Sin is lawlessness (1 Jn 3 : 4). Is it possible to expect to go back to Heaven by practicing the lawlessness?. NO. but even people claim that they believe in God with the lawlessness. What is their result?
21 “Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but only the one who does the will of my Father who is in heaven.22 Many will say to me on that day, ‘Lord, Lord, did we not prophesy in your name and in your name drive out demons and in your name perform many miracles?’23 Then I will tell them plainly, ‘I never knew you. Away from me, you evildoers( Lawlessness : ESV)!’ (Matt. 7 : 21~)
God surely said ” I never know you, Away from me” to those who claim they believe in God and perform many miracles with the name of God. They will not be saved finally, for their behavior to practicing Lawlessness: Sin.