Is the husband obligated to arrange for his parents to visit Saudi Arabia to perform Umrah, especially since they have previously performed Hajj and Umrah, given his wife's refusal and threats of divorce, claiming that the extra expenses are more rightfully hers and their son's?

Reconciling the satisfaction of both parents and wife is one of the most difficult situations, and the husband must strive to mediate between them. Extended family problems can be a cause of conflict between your wife and your family, and the solution is to bring your wife to live with you. Your wife has rights upon you, and you must maintain your happiness together without infringing upon your parents' rights and dignity. Start by bringing your wife over, and postpone discussing the matter of your parents with her, and apologize to your parents for the delay. After your wife arrives, win her affection and persuade her to accept the situation, seeking reward from Allah.