We are not all God’s children as some would have you believe. Only those who have received Him, have the right to become His children.
A choice must be made.
But as many as received Him, to them He gave the right to become children of God, to those who believe in His name: who were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.
John 1:12-13 NKJV