Is what the wife did—taking the money and leaving the father with his children—considered theft and injustice, and is she entitled to what she did?

Islam is an integrated system of rulings and teachings that include prayer, fasting, and good treatment. Good treatment and refraining from harming others are considered fundamental pillars, without which acts of worship would be soulless or fruitless. True prayer restrains from indecency and evil, and fasting yields piety. The spirit and fruit of worship are manifested in conduct through morals, commitment, and good dealings. The Prophet, peace be upon him, clarified that an abundance of prayer, fasting, and charity is of no benefit if accompanied by harming neighbors with one's tongue, and that little worship combined with good character and not harming neighbors leads to Paradise. Likewise, bad character spoils deeds. Therefore, Islam and faith are an integrated structure of speech, belief, and action, and the extent of one's commitment to this determines their Islam. We advise you to seek another wife of religion and good character to live a happy life and to take care of your children.