Is taking the stance of divorcing a wife who insulted the Messenger (peace be upon him) correct, or is there a better stance?

You have done well in your jealousy; for love of the Prophet, peace and blessings be upon him, is obligatory. Allah has rebuked those who prioritize their families and wealth over Allah and His Messenger. The belligerent disbeliever who insults the Prophet, peace and blessings be upon him, abrogates his covenant and protection. It is obligatory to separate from a wife who insults the Prophet, peace and blessings be upon him, because her shamelessness and audacity in reviling religion affect the religion of the husband and children. Marriage to a woman of the People of the Book is permissible with the hope of her conversion to Islam. However, if this hope is weak and there is fear for the religion of the children, then divorcing her becomes certain, and her apology may not be sincere.