If you read the account of Jesus and his close followers they were accused of being  a cult. Of following the devil too. But they were not.  When Jesus  healed a man they said it was by means of  the devil.  And Jesus said it was by means of the finger of God, and  another disciple in tellling of this account  called  it  by means of God's spirit. So like a finger of God Jesus healed the man because he had been given power to do so.  That power was proof that  God was behind Jesus. So the power of holy spirit  showed Jesus was the son of God. It authorized him to do his work. Peter spoke to Christians saying  You are a new  nation( not the old nation of Israel) but a nation for a special puroise  to declare forth the excellencies of the one who called you OUT of darkness into his wonderful light.  " So the purpose of being a christian , a true christian is to declare  about that new nation.. You did not notice I am sure, but when the thousends were baptized it said "taken OUT of the nations."  So they were no longer  partiotic people from whatever nation they lived in or traveled to. They now were  members of that new nation, God's kingdom. And now  as Paul stated at  2 cor. 5: 20 they were ambassadors  seeking to reconcile people to God. Reconcile people to God?  The Jews in Israel considered themselves as belonging to God. But their leaders  were against  Jesus who was sent from God.. and why  is it necessary to be taken out of the nations???  Adam and Eve chose Satan  as the one to obey instead of  God, and  therefore the nations  made form all their descendants were also  Satans nation. Tnhere was only one nation formed by God  thru Moses  that had Gods laws and  promised to obey God. The nation of Israel  left  Gods laws, sadly.

DAniel ch. 2 says of the last days.... All the nations will fall! So what nation will you be in ? Paul in Heb. ch. 12 says  Jehovah will shake all the nations and only one will stand.... And Paul also says "We are to receive the kingdom... yes  Jehovahs kingdom will  not fall.  So where do you want to be? In a nation that will fall or in a nation that will stand?