Yes, we should be. Are we? What does Jesus say? Try Matthew 5: Blessed are the peacemakers, for they shall be called children of God.
If you are not a peacemaker in the way that Jesus intended, will you be called children of God? Hint: God is willing to call us all His children. But He puts conditions on it, as here. It is not on His Head (as it were) - He already has extended His hand to us. It is we humans who have to stop rebelling against Him and follow His directives and commandment.
John 1:11-13 “He came to that which was his own, but his own did not receive him. Yet to all who did receive him, to those who believed in his name, he gave the right to become children of God— children born not of natural descent, nor of human decision or a husband’s will, but born of God.”
Romans 8:14-15 “For those who are led by the Spirit of God are the children of God. The Spirit you received does not make you slaves, so that you live in fear again; rather, the Spirit you received brought about your adoption to sonship. And by him we cry, “Abba, Father.” “
Galations 3:26-27 “So in Christ Jesus you are all children of God through faith, for all of you who were baptized into Christ have clothed yourselves with Christ.”
I John 3:2 “Dear friends, now we are children of God, and what we will be has not yet been made known. But we know that when Christ appears, we shall be like him, for we shall see him as he is.”