A kingdom can only have one king. If God is King then all other kings must stop being kings. If God is lawgiver, then other law givers will have to find something else to do. If they are unwilling to become judges applying God’s law, they are usurpers and rebels.
Mary understood very clearly the implications of Jesus birth, and spelt out the consequences of what God would accomplish in her song of joy.
He has performed mighty deeds with his arm;
he has scattered those who are proud in their inmost thoughts.
He has brought down rulers from their thrones
but has lifted up the humble.
He has filled the hungry with good things
but has sent the rich away empty (Luke 1:52-53)
A major implication of Jesus ascension into heaven is that he is king of the universe, so rulers should be brought down from their thrones. God will raise up humble judges in their place.
Unfortunately, Christians have failed understood Paul's message about submission to authority and have twisted the scriptures to give a justification to kings and parliaments that have set themselves up in opposition to God.