What about other pre-Vatican II EM's that resulted from Latin Masses where the host turned to blood? Those were not to show God was offended.
Several pre-Vatican II EM's involved attempted desecrations. There is one that involved a woman stealing a host for sacrilegious purposes, even though Communion in the hand was not allowed. She quickly removed the Lord from her mouth. So it was indeed to show that God was offended by the action. But it was consecrated at a Tridentine Mass, and so it had nothing to do with the Mass itself.
But it is my opinion that God would not even tacitly endorse a Mass that displeases Him. If the NOM displeases Him, something like this would in effect give a divine stamp of approval to the NOM itself rather than just be taken as condemning the practice of Communion in the hand. In fact, the Novus Ordites probably do not see this as a commentary of Communion in the hand but just against a grosser mistreatment of the Blessed Sacrament. Yes, this incident occurred due to Communion in the hand, but pre Vatican II desecrations occurred even when Communion was given exclusively on the tongue.