Is a man's separation from his first wife—the mother of two infant children—in order to marry another woman he loves considered an injustice to his wife and children, and will this bring God's wrath or His blessing?

Islamic law has permitted marrying more than one woman for those who are able to do so, provided there is justice among the wives. Divorce is permissible, especially when the situation between the spouses is not upright and hatred and aversion occur, so that no one is wronged. However, it should not be resorted to except after all means of reconciliation have failed, especially when there are children. If it is possible to live together and associate in a good manner, even by overlooking some shortcomings and waiving some rights, that would be preferable to separation.