Who are God's people and what makes them holy (sanctified, set apart and clean)?

Who are God's people? The Jews? Or, do they include more people?   "But Pharaoh shall not hearken unto you, that I may lay my hand upon Egypt, and bring forth mine armies, and my people the children of Israel, out of the land of Egypt by great judgments." (Exodus 7:4 KJV) "Oh that my people had hearkened unto me, and Israel had walked in my ways!" (Psalm 81:13 KJV) "Maschil of Asaph. Give ear, O my people, to my law: incline your ears to the words of my mouth." (Psalm 78:1 KJV) "Hearken unto me, my people; and give ear unto me, O my nation: for a law shall proceed from me, and I will make my judgment to rest for a light of the people." (Isaiah 51:4 KJV) Who is a TRUE believer of Yah? Yeshua's (Jesus') explanation of a TRUE believer: John 5:46-47; 15:14-15 1 Thessalonians 2:13; John 3:16-21; 1 Peter 2:7; 1 Timothy 4:3; 2 Thessalonians 2:11-13; Matthew 21:32; 2 Cor. 6:14-18 Do people naturally obey the law (Torah of God-His instructions and His way of life) as Romans 2:14-15 seems to indicate? Or, are we lacking other scriptures to help us properly interpret Romans 2:14-15? "Because the carnal mind is enmity against God: for it is not subject to the law of God, neither indeed can be. So then they that are in the flesh cannot please God. But ye are not in the flesh, but in the Spirit, if so be that the Spirit of God dwell in you. Now if any man have not the Spirit of Christ, he is none of His." (Romans 8:7-9) What does it mean to have a carnal mind? Jesus stated, ". . . he that is not against us is for us."  (Luke 9:50) What did Jesus mean considering the historical context of the 1st century? How is one "not against" Jesus? What is the signifcance of John the Baptist doing no miracles (John 10:41)? Do miracles prove obedience?